ocab ai
Get started

C1 English vocabulary

The 11 most common English words at CEFR C1 — with translation, IPA, and an example each. The right foundation for your level.

Want to practice these words?

Save the 50-word starter Free · no card · top 50 by frequency

Want all 11?

Unlock the full list with Pro Pro · the whole list in one click

How to use this list

These are the C1-level words you meet most in real English, in frequency order. Learning by level gives you a clear path: master C1, move up. Save the top 50 free and start today. — Joao

  1. 001
    bastardn. /ˈbæstərd/
    an unpleasant or despicable person He acted like a real bastard today.
  2. 002
    lieutenantn. /lɛfˈtɛnənt/
    a military rank or officer The lieutenant led the troops into battle.
  3. 003
    ltn. /ɛl tiː/
  4. 004
    coloneln. /ˈkɜːrnəl/
  5. 005
    gruntingv. /ˈɡrʌntɪŋ/
    making low, guttural sounds The pig was grunting in the pen.
  6. 006
    majestyn. /ˈmædʒɪsti/
  7. 007
    bullshitn. /ˈbʊlʃɪt/
    nonsense or foolish talk I can't believe the bullshit he just said.
  8. 008
    investigationn. /ɪnˌvɛstɪˈɡeɪʃən/
    a careful examination or inquiry The investigation revealed new evidence.
  9. 009
    suiciden. /ˈsuːɪsaɪd/
    The act of intentionally ending one's life. He spoke openly about his struggles with suicide.
  10. 010
    indistinctadj. /ɪndɪˈstɪŋkt/
    Not clear or sharply defined. The voice in the distance was indistinct and muffled.
  11. 011
    murderern. /ˈmɜːrdərər/
    a person who kills another person The police arrested the suspected murderer last night.

Want to practice these words?

Save the 50-word starter Free · no card · top 50 by frequency

Want all 11?

Unlock the full list with Pro Pro · the whole list in one click

See also

Frequently asked

What does C1 mean?

C1 is a level on the CEFR scale. This list gathers the English words classified at C1, ordered by real-world usage frequency.

Why only 50 on the free starter?

Vocabai Free is capped at 50 words per list. Pro removes the cap and imports the whole list in one click.

How do I practice them?

Save the list and Vocabai drills it with spaced repetition, quizzes, matching, and AI conversation.