C1 English vocabulary list
188 useful C1 (advanced) words, grouped by topic, with US audio. You can understand long, demanding texts, express yourself fluently without searching for words, and use English flexibly at work or in study.
- 188 C1 words
- US audio
- C1 advanced
- 10 quiz questions
C1 words quiz
10 questions on C1 words
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Question 1 of 10Meaning
What does appliance mean?
An appliance is an electric machine that does a job in the house, like washing clothes, keeping food cold or boiling water.
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Question 2 of 10Meaning
What does automate mean?
When you automate a job, you set up a machine or a program so that it does the work on its own, and nobody has to do it by hand.
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Question 3 of 10Meaning
What does betray mean?
When you betray someone, you break their trust: they believed you were on their side, but you did something that hurt them.
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Question 4 of 10Meaning
What does bottleneck mean?
A bottleneck is the one slow part of a system, like a busy step that everything has to wait for, so the whole process moves slowly.
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Question 5 of 10Meaning
What does chronic mean?
A chronic illness or pain does not go away quickly; it stays for months or years, or it keeps coming back again and again.
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Question 6 of 10Meaning
What does empathy mean?
Empathy means you can imagine how someone else feels, almost as if the same thing were happening to you.
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Question 7 of 10Meaning
What does faint mean?
If you faint, you suddenly fall down and stop being aware of anything for a few seconds, for example on a very hot day or after a shock.
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Question 8 of 10Meaning
What does fracture mean?
A fracture is when a bone breaks or cracks, for example after a bad fall. It is the medical word for a broken bone.
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Question 9 of 10Meaning
What does linger mean?
If you linger, you do not hurry away. You stay a little longer than you need to, usually because you are enjoying the place or the moment.
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Question 10 of 10Meaning
What does moody mean?
A moody person can be cheerful one moment and upset or cross the next, and you often cannot tell why their feelings changed.
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C1 words by topic
Press the speaker to hear a word. Open a word for its meaning, examples and a quiz.
Work and business (33)
From the work word of the day: each word has a page with notes, mistakes and five questions once it is out.
- accountable adjective Having to explain or take responsibility for your actions and decisions. Managers are accountable for their team’s results.
- appraisal noun A meeting or report in which a manager looks at how well an employee has done their job. I have my annual appraisal next Tuesday.
- attendee noun A person who goes to a meeting, an event or a course. All attendees must sign in at the front desk.
- bottleneck noun A point in a process where work slows down because too much has to pass through one narrow place. The approval step is the bottleneck in our process.
- commission noun Extra money a salesperson earns for each thing they sell, usually a percentage of the price. He earns a small salary plus ten percent commission.
- consensus noun A general agreement among a group of people. The team reached a consensus after a long discussion.
- delegate verb To give part of your work or power to someone else so that they do it for you. A good manager knows when to delegate.
- entrepreneur noun A person who starts their own business, often taking a risk to do something new. She became an entrepreneur at twenty-five.
- escalate verb To pass a problem to someone with more authority, or to become more serious or more intense. I’ll escalate this complaint to my manager.
- facilitate verb To make a process or action easier, for example by leading a discussion or arranging what people need. She facilitated the workshop and kept everyone on time.
- forecast noun A statement about what will probably happen in the future, based on information you have now. The sales forecast for next year is good.
- headquarters noun The main office of a company or organisation, where the most important decisions are made. The company’s headquarters is in Munich.
- initiative noun The ability to decide and act on your own, without waiting to be told what to do. She showed real initiative by fixing the problem herself.
- leverage verb In business English, to use something you already have, such as skills, data or contacts, to get a better result. We can leverage our customer data to improve the app.
- mentor noun An experienced person who gives advice and support to someone with less experience, especially at work. My first manager was also my mentor.
- milestone noun An important point in a project or in life, used to show progress. Hitting a million users was a big milestone for the app.
- onboarding noun The process of helping a new employee or customer get started, with introductions, training and information. The onboarding for new staff takes about two weeks.
- outsource verb To pay another company to do some of your work, instead of doing it with your own staff. The firm outsourced its customer service to another country.
- overdue adjective Late, because it should have been done, paid or returned before now. My library book is two weeks overdue.
- proactive adjective Acting early to prevent a problem or to make something happen, instead of waiting for it to happen. Be proactive and ask your boss for feedback.
- probation noun A short trial period at the start of a new job, when an employer checks if you are right for the role. I’m still on probation for another two months.
- procrastinate verb To keep delaying something you should do, usually because it is boring or difficult. I always procrastinate when I have an essay to write.
- proofread verb To read a text carefully to find and correct small mistakes before it is published or sent. Please proofread your CV before you send it.
- recruit verb To find and hire new people to work for a company or join an organisation. We’re recruiting three new teachers this year.
- redundancy noun The loss of a job because the employer no longer needs the position, not because of anything the worker did wrong. Fifty people faced redundancy when the factory closed.
- regarding preposition About, used to name the subject of a letter, an email or a conversation, especially in formal writing. I’m writing regarding your recent order.
- reimburse verb To pay someone back money that they spent for you. The company will reimburse your travel costs.
- setback noun Something that stops progress or makes a situation worse for a while. Losing the first match was a setback, but the team recovered.
- shareholder noun A person or company that owns shares in a business and so owns a small part of it. Shareholders voted to accept the new offer.
- shortlist verb To choose a small number of the best people or things from a longer list, before making the final choice. They shortlisted four candidates for the final interview.
- stakeholder noun A person or group that has an interest in a project or business, or is affected by what it does. We need to keep all stakeholders informed about the changes.
- streamline verb To make a process simpler and faster by removing steps that waste time. We streamlined the booking system to save time.
- supplier noun A company or person that provides goods or materials to a business. We changed our supplier because deliveries were always late.
Travel (24)
From the travel word of the day: each word has a page with notes, mistakes and five questions once it is out.
- authentic adjective Real and true, not a copy or made to look like something else. We ate authentic Italian pizza in Naples.
- breathtaking adjective So beautiful or impressive that it surprises you and takes your breath away. The view from the top was breathtaking.
- cancellation noun A decision that something planned will not happen, or the act of ending a booking. The cancellation of our flight ruined the trip.
- culture shock noun The confused or uncomfortable feeling you have when you move to a place with a very different way of life. I had culture shock in my first week in Tokyo.
- detour noun A longer way to a place that you take because the usual road is closed or because you want to see something. The road was closed, so we took a detour.
- embark verb To get on a ship or plane at the start of a journey, or to start a long or important trip or project. Passengers can embark from two o’clock.
- excursion noun A short trip made for pleasure, often with a group, usually in one day. We went on an excursion to the island.
- fare noun The price you pay for a journey by bus, train, taxi or plane. The taxi fare to the airport is about thirty euros.
- gap year noun A year taken out between school and university, or between jobs, often used for travel or work experience. She took a gap year to travel through Asia.
- haggle verb To argue about a price until you and the seller agree on a lower one. You have to haggle at the market.
- hospitality noun Friendly and generous treatment of guests, or the business of hotels, restaurants and tourism. Thank you for your warm hospitality.
- linger verb To stay somewhere longer than necessary, because you enjoy it or do not want to leave. We lingered over coffee after dinner.
- navigate verb To find your way to a place, using a map, a phone or road signs. I can navigate with a map on my phone.
- off-season noun The time of year when fewer tourists visit a place, so prices are lower and it is quieter. Prices are much lower in the off-season.
- overbooked adjective Having more people with reservations than there are seats or rooms available. Our flight was overbooked, so we waited for the next one.
- picturesque adjective Very attractive in a way that looks like a picture, especially a village or a scene. We stayed in a picturesque village by the lake.
- roam verb To walk or travel freely over a large area, often without a clear plan. Wild horses roam across the valley.
- scenic adjective Having beautiful views of nature or countryside. We took the scenic route along the coast.
- spontaneous adjective Done because you suddenly want to, not planned. We took a spontaneous trip to the coast.
- stopover noun A short stay in a place between two parts of a long trip, often for a night or a few days. We had a two-day stopover in Dubai.
- tourist trap noun A place that is crowded and expensive, and made mainly for visitors, not for local people. The restaurant by the tower was a total tourist trap.
- touristy adjective Full of tourists and made for them, often expensive and not very real. The main square is beautiful but very touristy.
- turbulence noun Sudden, rough movements of air that shake an aircraft in flight. We hit some turbulence over the mountains.
- unwind verb To relax and stop feeling tense after work or a busy time. I like to unwind on the beach with a book.
Tech and the internet (27)
From the tech word of the day: each word has a page with notes, mistakes and five questions once it is out.
- algorithm noun A set of steps that a computer follows to solve a problem or make a decision. The app’s algorithm shows you videos you may like.
- automate verb To make a machine or program do a job by itself, without a person. We automated the weekly report.
- bandwidth noun The amount of data a connection can carry. Video calls use a lot of bandwidth.
- breach noun An event where private information is seen or stolen by people who should not have it. The company reported a data breach last week.
- cache noun A place on your device where the browser keeps copies of web pages so they open faster next time. Clear your cache if the page looks wrong.
- chatbot noun A computer program that talks with you in writing or speech, for example to answer customer questions. The bank’s chatbot answered my question in seconds.
- compatible adjective Able to work together or be used together without problems. This charger is compatible with most phones.
- customise verb To change something to suit your own needs or taste. You can customise the home screen with your photos.
- default noun The setting that is used automatically unless you choose another one. English is the default language on this phone.
- encrypt verb To change information into a secret code so that only the right person can read it. Messaging apps encrypt your messages.
- firewall noun A security program or device that controls what can enter or leave a network, to keep out harmful traffic. The firewall blocked the strange website.
- influencer noun A person with many followers online who can affect what other people buy or do. She became a travel influencer on Instagram.
- interface noun The part of a program or device that you see and use, such as the buttons and menus on a screen. The app has a clean, simple interface.
- intuitive adjective Easy to understand and use without needing instructions. The app is intuitive, so I didn’t need a guide.
- lag noun A delay between what you do and what happens on screen, for example in a game or video call. There’s too much lag on this video call.
- malware noun Software made to damage a computer or steal information from it. The email attachment contained malware.
- outage noun A period when a service, such as electricity, the internet or a website, is not available. A power outage left the whole street in the dark.
- outdated adjective Old and no longer useful because newer things have replaced it. My phone is outdated and slow.
- phishing noun Sending fake emails or messages to trick people into giving passwords or money. The email was a phishing attempt.
- reboot verb To turn a computer or device off and on again so that it starts fresh. Try rebooting your laptop.
- surveillance noun Careful watching of a person or a place, often with cameras, to see what they do. The shop uses cameras for surveillance.
- sync verb To make the files on two or more devices match each other, usually over the internet. My photos sync between my phone and my laptop.
- troubleshoot verb To find out why something is not working and fix it, step by step. I spent an hour troubleshooting the printer.
- upgrade noun A newer or better version of a product or service that you get or pay for. I’m waiting for the upgrade to the new model.
- verify verb To check that something is true or correct, for example your identity or an email address. Please verify your email address.
- versatile adjective Able to do many different things well, or useful in many different ways. Eggs are one of the most versatile foods in the kitchen.
- viral adjective Spreading very quickly online as many people share it. Her video went viral overnight.
Health and body (38)
From the health word of the day: each word has a page with notes, mistakes and five questions once it is out.
- ambulance noun A vehicle that takes sick or injured people to hospital quickly. Call an ambulance, please. He’s not breathing.
- antibiotic noun A medicine that kills bacteria and treats infections. The doctor gave me antibiotics for my throat.
- anxiety noun A strong feeling of worry or fear about something that might happen. She felt a wave of anxiety before the exam.
- blood pressure noun The force of blood against the walls of your blood vessels, measured with a cuff on your arm. The nurse checked my blood pressure.
- bruise noun A dark mark on the skin where you have hit it, caused by blood under the skin. I fell and got a big bruise on my leg.
- chronic adjective Lasting for a long time or happening again and again, usually describing an illness. She has chronic back pain.
- contagious adjective Easily passed from one person to another by touch or by being close. The flu is very contagious.
- cramp noun A sudden painful tightening of a muscle. I got a cramp in my leg while swimming.
- dehydrated adjective Not having enough water in your body. I felt dizzy because I was dehydrated.
- diagnosis noun A doctor’s decision about what illness a person has, after examining them or doing tests. The doctor gave her a diagnosis after the tests.
- dose noun The amount of medicine you take at one time. Take one dose every eight hours.
- faint verb To suddenly lose consciousness for a short time, often because of heat, shock or no food. She fainted when she saw the blood.
- fatigue noun Extreme tiredness that does not go away with a little rest. Fatigue is a common symptom of the flu.
- fracture noun A break or crack in a bone. The X-ray showed a small fracture in his wrist.
- hygiene noun Keeping yourself and your surroundings clean to stay healthy. Good hygiene stops germs spreading.
- immune adjective Protected from a disease because your body can fight it. You are immune to measles after the vaccine.
- infection noun An illness caused by bacteria or a virus that enters your body. She has an ear infection.
- inflammation noun A condition where a part of the body becomes red, hot, swollen and painful, often as a response to injury or infection. The inflammation in my knee is getting better.
- insomnia noun A long-term problem with falling asleep or staying asleep. She suffers from insomnia and wakes at three every night.
- migraine noun A very bad headache, often with feeling sick and sensitivity to light. I get a migraine when I’m stressed.
- nausea noun The feeling that you are going to be sick. The medicine can cause nausea.
- numb adjective Not able to feel anything in a part of your body, for example because of cold or an injection. My fingers went numb in the cold.
- nutrition noun The food you eat and the way it affects your health and growth. Good nutrition is important for children.
- pharmacy noun A shop where you can buy medicine and get prescriptions filled. I’ll pick up the medicine at the pharmacy.
- posture noun The way you hold your body when you stand or sit. Sitting at a desk all day is bad for your posture.
- prescribe verb To officially tell a patient to use a medicine or treatment, and write the instructions down. The doctor prescribed antibiotics for my throat.
- quarantine noun A period when a person or animal that may have a disease is kept away from others so it cannot spread. Travellers had to go into quarantine for ten days.
- rash noun An area of red, spotty or itchy skin. I got a rash on my arm after using the cream.
- resilient adjective Able to recover quickly after something difficult, such as an illness, a shock or a failure. Children are often more resilient than adults think.
- shiver verb To shake slightly because you are cold, ill or afraid. I was shivering with cold at the bus stop.
- snore verb To breathe noisily while you sleep. My husband snores so loudly that I can’t sleep.
- stamina noun The physical or mental energy that lets you keep doing something for a long time. Marathon runners need great stamina.
- sunburn noun Red, sore skin caused by staying too long in strong sun. I got sunburn on my shoulders at the beach.
- surgery noun A medical operation in which a doctor cuts into the body to repair or remove something. He had surgery on his knee last year.
- swollen adjective Bigger than normal because of injury or illness. My ankle is swollen after the fall.
- therapy noun Treatment for a physical or mental problem, often involving regular sessions with a trained professional. She goes to therapy once a week.
- vaccine noun A medicine given to people, usually by injection, to protect them from a disease. The vaccine protects against measles.
- well-being noun The state of being comfortable, healthy and happy. Walking in nature is good for your well-being.
Everyday life and home (29)
From the home word of the day: each word has a page with notes, mistakes and five questions once it is out.
- appetite noun The wish to eat food. I’ve lost my appetite since I got the flu.
- appliance noun A machine for use in the home, such as a washing machine, fridge or kettle. We bought a new kitchen appliance.
- bland adjective Having a mild taste with little flavour. The soup was bland, so I added salt.
- compost noun Natural material such as vegetable waste that rots and is used to feed plants in a garden. We put our vegetable peelings in the compost.
- declutter verb To remove things you do not need from a room or a space, so it is tidier and easier to use. I decluttered my wardrobe and gave away three bags of clothes.
- furnished adjective Having furniture, for example a flat that you can rent with a bed, sofa and table. We rented a furnished flat near the station.
- household noun All the people who live together in one home, or the home itself with its daily running. Every household received a leaflet about recycling.
- housewarming noun A party to celebrate moving into a new home. We’re having a housewarming on Saturday.
- improvise verb To make or do something without planning, using whatever you have at the moment. I forgot my notes, so I had to improvise.
- leak noun A hole or crack where liquid or gas escapes from something. There’s a leak in the bathroom ceiling.
- lease noun A legal contract that lets you use a property for a fixed time in return for rent. We signed a one-year lease.
- marinate verb To leave meat, fish or vegetables in a sauce for some time before cooking, so they take on its flavour. Marinate the chicken for at least an hour.
- mortgage noun A loan from a bank that you use to buy a house and pay back over many years. We took out a mortgage to buy the flat.
- overdraft noun An arrangement with your bank that lets you spend more money than you have in your account. I’m in my overdraft until payday.
- oversleep verb To sleep longer than you planned. I always oversleep on Mondays.
- potluck noun A meal where each guest brings a dish to share. We’re having a potluck on Friday. Bring a dish!
- renovate verb To repair and improve an old building so that it looks new again. They renovated the old farmhouse last year.
- ripe adjective Fully grown and ready to eat, usually of fruit. These peaches are ripe and very sweet.
- shrink verb To become smaller, especially when cloth gets smaller after washing. Wool can shrink if you wash it too hot.
- simmer verb To cook gently in liquid that is almost, but not quite, boiling. Let the sauce simmer for twenty minutes.
- snooze verb To sleep lightly for a short time, or to press the snooze button on an alarm to get a few more minutes of sleep. I always snooze my alarm twice.
- spacious adjective Having plenty of room inside. The living room is bright and spacious.
- spill verb To let liquid fall out of a container by accident. I spilled coffee on my laptop.
- splurge verb To spend a lot of money on something special, often more than you planned. I splurged on a nice dinner for my birthday.
- stale adjective No longer fresh, usually describing bread, cake or air. The bread was stale, so we made toast.
- tenant noun A person who pays rent to live in a house or flat that belongs to someone else. The tenants upstairs are very quiet.
- thrifty adjective Careful with money and not wasting it. My grandmother was very thrifty and reused everything.
- utilities noun Basic services for a home, such as electricity, gas, water and internet. Rent includes utilities.
- warranty noun A written promise from a company to repair or replace a product if it breaks within a certain time. The washing machine has a two-year warranty.
Feelings and people (35)
From the feelings word of the day: each word has a page with notes, mistakes and five questions once it is out.
- acquaintance noun A person you know a little, but who is not a close friend. We aren’t friends, just acquaintances from work.
- arrogant adjective Behaving in a proud, rude way because you think you are better than other people. He’s so arrogant that he never listens to anyone.
- ashamed adjective Feeling very bad because of something you did, or something you are, that you think is wrong or bad. I’m ashamed of how I behaved at the party.
- betray verb To hurt someone who trusts you by doing something disloyal, such as breaking a promise or telling their secret. He betrayed his best friend by telling her secret.
- bittersweet adjective Mixing happiness and sadness at the same time. Graduation day was bittersweet for all of us.
- bond noun A strong connection between people, such as between friends or family. There is a strong bond between the two sisters.
- compassion noun A feeling of sympathy for someone who is suffering, with a wish to help. The nurse treated everyone with compassion.
- considerate adjective Careful not to upset other people; thinking about their feelings and needs. It was considerate of you to call ahead.
- content adjective Quietly happy and satisfied with what you have. She seems content with her life.
- courage noun The ability to do something difficult or frightening. It took courage to speak up in the meeting.
- empathy noun The ability to understand and share another person’s feelings. A good nurse shows empathy for patients.
- flattered adjective Feeling pleased and proud because someone has said something very nice about you. I’m flattered that you asked me.
- fond adjective Liking someone or something, especially in a warm, gentle way. I’m very fond of my aunt.
- gloomy adjective Dark and sad, or without hope. It was a gloomy, grey day.
- gossip noun Talk about other people’s private lives, often not kind and not always true. There’s a lot of gossip in the office.
- grudge noun A feeling of anger or dislike towards someone because of something they did to you in the past. He still holds a grudge against his old boss.
- grumpy adjective Bad-tempered and easily annoyed, usually for a short time. I’m always grumpy before my first coffee.
- humble adjective Not proud or arrogant; knowing that you are not better than other people. Despite his success, he stayed humble.
- inevitable adjective Certain to happen, so it cannot be avoided or stopped. Some mistakes are inevitable when you learn a language.
- insecure adjective Not confident about yourself, or worried that you are not good enough. She felt insecure about her accent.
- loyal adjective Staying faithful to a person, a group or a brand, even when things are difficult. She is a loyal friend who never gossips about you.
- moody adjective Having moods that change quickly, often becoming unhappy or angry without a clear reason. My brother is moody in the morning.
- mutual adjective Felt or done by two or more people in the same way, or shared by them. The feeling is mutual.
- nostalgia noun A happy and slightly sad feeling when you think about good times in the past. Old songs fill me with nostalgia.
- offend verb To hurt someone’s feelings by saying or doing something rude. I didn’t mean to offend you.
- rapport noun A friendly connection between people in which they understand and like each other. The new teacher quickly built a rapport with her students.
- reassure verb To say or do something that makes a worried person feel calmer. The doctor reassured her that the test was normal.
- resentment noun A bitter feeling that stays after you think you were treated unfairly. She felt resentment towards her boss.
- rumour noun A story that many people are repeating but that may not be true. There’s a rumour that the company will close.
- sarcastic adjective Saying the opposite of what you mean in order to mock or criticise someone. “Great, another meeting,” he said in a sarcastic voice.
- self-conscious adjective Worried about what other people think of you, especially how you look or what you say. I always feel self-conscious when I speak English in public.
- sentimental adjective Connected with feelings of love or memories, often about the past. I keep my grandfather’s watch for sentimental reasons.
- sibling noun A brother or sister. I have three siblings, two brothers and a sister.
- tolerate verb To accept something that you do not like without complaining or taking action. I can’t tolerate loud music at night.
- vulnerable adjective Easy to hurt or harm, physically or emotionally. Children are vulnerable to infection.
Kitchen (1)
From the kitchen word list.
- stir verb Kitchen · Cooking actions
Body (1)
From the body word list.
- nod verb Body · Senses and small movements
Questions about C1 vocabulary
What does C1 mean in English?
C1 is the advanced level on the CEFR scale, which runs from A1 to C2. You can understand long, demanding texts, express yourself fluently without searching for words, and use English flexibly at work or in study.
How do I know if my English is C1?
Take the free English level test: 24 grammar, vocabulary and reading questions that end with your CEFR level, in 10 to 15 minutes.
Is this every C1 word?
No. This is a selection of useful C1 words from Slova’s free tools. Levels follow the Oxford 3000 and 5000 lists and the English Vocabulary Profile as guides, and are estimates.
How should I learn these words?
A few at a time: listen to each word, read its example out loud, then test yourself. Come back the next day and try to remember them before you look.