About English C1
C1 is the advanced tier of CEFR. At C1 you can express yourself fluently and spontaneously without much obvious searching for expressions, use language flexibly and effectively for social, academic, and professional purposes, and produce clear, well-structured, detailed text on complex subjects. C1 is the level required by most top-tier universities and professional roles.
All 1200 words at C1
Click any word to see its full breakdown: reading, translation, and a real example word.
C1 vocabulary in example sentences
See how each word is actually used before you memorise it. Tap the speaker to hear the pronunciation.
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How to study English C1
C1 takes 6-12 months on top of B2. Continue reviewing A1-B2 (5-minute daily) and add 50-100 new C1 words per week. Read English literature, academic papers, and long-form journalism; listen to English lectures and documentaries; and try writing 1000-2000 word essays on complex topics. By the end of C1 you should be able to read any English text (including academic papers) and express yourself with near-native precision.
Common questions about English C1
What does C1 English give you in practice?
Flexible, effortless use: you follow films, lectures and fast native conversation, adjust tone for formal and informal settings, and express ideas precisely without searching for words.
Why is reaching C1 harder than B2 in English?
The gap is no longer new topics but depth: idiomatic usage, register control and low-frequency words that appear exactly when a precise meaning matters. Progress feels slower because each gain is subtle — but it is what separates fluent from native-like.