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Classic usage
Estimated CEFR level: C2 — Proficiency
Estimated from word frequency; not an official CEFR classification.
From Middle English quadrat, quadrate, from Latin quadrātus (“square”), past participle of quadrō (“to make four-cornered, square, put in order, intransitive be square”), from quadra (“a square”), later quadrus (“square”), from quattuor (“four”).
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Classic usage
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