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Classic usage
Estimated CEFR level: C2 — Proficiency
Estimated from word frequency; not an official CEFR classification.
First attested 1548, from Late Latin perspicācitās (“discernment”), from Latin perspicax (“sharp-sighted”), from perspiciō (“look through”), from per- (“through”) + speciō (“look at”). See also perspective.
sagacious, sapient
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Classic usage
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