acuity
C1CEFR level
65/100Rarity: rare
TechnicalRegister
Medicine noun
Sharpness of a sense or of thought; severity of illness.
Her visual acuity dropped in the left eye first.
Business noun
Sharpness of thought, insight, or perception.
Her commercial acuity let her spot the flawed assumption buried in the client's five-year forecast.
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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