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CEFR C1 Vocabulary Flashcards — 200 Words

Master sophisticated C1-level vocabulary with 200 advanced words. C1 covers abstract concepts, idioms, phrasal verbs, and the precise word-choice that separates fluent speakers from advanced learners. Aim for fifteen cards a day over four to six weeks; review missed cards twice the next session for fastest mastery.

Studying CEFR C1 Vocabulary

CEFR C1 is the official Council of Europe level for vocabulary at this stage. Each card in this deck links to its full ESLBuzz dictionary entry — definitions, IPA, example sentences, common mistakes, and word forms. Aim for 15 cards a day; track your streak in the progress bar above.

All 200 C1 Words to Master

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How to Use These Flashcards

  1. Use spaced repetition. After flipping, rate the card honestly — Try again, Got it, or Easy. The next review is automatically scheduled (1 day → 6 days → longer).
  2. Switch modes daily. Recognition (word → meaning) trains comprehension; Recall (meaning → word) trains production; Pronunciation (audio → spelling) trains listening.
  3. Open audio every time. Hearing the word with each review boosts retention more than reading alone — especially for vowels and stress patterns.
  4. Learn in word families. Use the dictionary link to see the noun/verb/adjective forms; learning all forms together is roughly twice as efficient as memorising in isolation.

Tips for C1 Learners

C1 requires nuance: the same definition might map to slightly different registers. Use the synonyms tool from each card to compare formal vs. informal options.

Most Important C1 Words to Learn First

Start your study session here — these are the highest-frequency entries at this level.

gross-domestic-product /ˌɡroʊs dəˈmɛstɪk ˈprɑːdʌkt/ The full name for GDP; the total value of everything produced in a country during one year, measured in money. acquisition /ˌækwɪˈzɪʃən/ When a business gets a new customer or buys another company. Also means getting something you didn't have before. aggregate /ˈæɡrɪɡət/ A total or complete amount made by adding together many different parts or pieces. allocate /ˈæləkeɪt/ To divide something up and give it to different people or use it for different purposes in a planned way. ambivalent /æmˈbɪvələnt/ Feeling two opposite emotions at the same time. You both like and dislike something, or aren't sure how you feel. bias /ˈbaɪəs/ A preference or leaning toward something, often unfair. A tendency to judge or support something before knowing the facts. brokerage /ˈbroʊkərɪdʒ/ A company or service that buys and sells stocks, bonds, and other investments for customers. The fee or commission a broker charges is also called brokerage. capitalize /ˈkæpətəˌlaɪz/ To provide money to start or run a business. When a company is capitalized, it means investors have given it money to operate. cash-flow /ˈkæʃˌfloʊ/ The actual money coming in and going out of a business. If more money comes in than goes out, it's positive cash flow. If more goes out, it's negative. commercialize /kəˈmɜː.ʃəl.aɪz/ To turn something into a business that sells products or services to make money. cultivate /ˈkʌltɪveɪt/ To grow something deliberately—whether plants or personal qualities like confidence or relationships. It requires time and care. deed /diːd/ An official paper that proves who owns a piece of property. When you buy a house, you receive the deed as proof of ownership. deliverable /dɪˈlɪvərəbəl/ Something you must produce and give to someone as part of a project. Could be a report, software, design, or any agreed-upon output. disrupt /dɪsˈrʌpt/ To completely change or upset the way an industry works, usually by introducing something new and better. disseminate /dɪˈsemɪneɪt/ To spread information widely so that many people know about it. Like sharing news or facts across a large area. diversification /daɪˌvɜːrsɪfɪˈkeɪʃən/ Not putting all your money in one place. If you own stocks in many different companies and also buy bonds and real estate, you're diversifying. empirical /ɪmˈpɪrɪkəl/ Based on facts you can see, measure, or test yourself—not just ideas or theories. You prove it by doing experiments or gathering data. entity /ˈɛntɪti/ Any separate thing or being. Can be a person, organization, object, or idea that exists on its own. equity /ˈɛkwɪti/ The amount a company is worth to its owners after paying all debts. It's what shareholders actually own. eviction /ɪˈvɪkʃən/ When a landlord legally forces a tenant to leave a rented property. Usually happens due to unpaid rent or breaking lease rules.

Frequently Asked Questions About C1 Flashcards

How long does it take to learn C1 vocabulary?

Most learners reach comfortable C1 recall in 3 to 6 weeks at 15 cards per day with spaced repetition. The progress widget at the top of this deck tracks your daily count.

Should I study every card or focus on the top words?

Start with the "Most Important Words to Master" section above — those are the highest-frequency entries at this level. Once you score "Easy" on most of them, expand to the full deck.

How does the spaced repetition schedule work?

When you rate a card, the SM-2 algorithm picks the next review interval — 1 day for "Try again", 6 days for the second "Got it", and longer intervals as your ease factor grows. Cards you struggle with come back sooner.

Can I study offline?

Progress is stored in your browser via localStorage, so you can keep practicing if your connection drops. To sync across devices, sign in with an ESLBuzz account.

What if I do not understand a word?

Tap the "Open full dictionary entry" link on the back of any card to read the full definition, IPA, examples, and common mistakes for that word.

Continue Studying

Continue to C2 →Next CEFR level deck DictionaryFull word entries Sentence AnalyzerParse grammar ConjugatorVerb forms