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Classic usage
Reading level: hard
Estimated CEFR level: C2 — Proficiency
Estimated from word frequency; not an official CEFR classification.
From Middle English agu, ague, borrowed from Middle French (fievre) aguë, “acute (fever)” (Modern French fièvre aiguë), from Late Latin (febris) acuta (“acute fever”), from Latin acūtus (“sharp, acute”) + febris (“fever”). Doublet of acute.
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Classic usage
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