cataract
B1CEFR level
35/100Rarity: fairly common
TechnicalRegister
A clouding of the eye's natural lens that causes gradual, painless loss of vision.
The cataract had matured to the point where she could no longer read the newspaper.
Rarity runs from 0 (a word everyone knows) to 100 (almost never seen outside specialist or literary writing). Level is the word's real difficulty on the CEFR scale, from A1 to C2.
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