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Classic usage
Estimated CEFR level: C2 — Proficiency
Estimated from word frequency; not an official CEFR classification.
Uncertain. Possibly from Middle English *churren, *chirren, *cherren, from Old English ċeorian (“to murmur, grumble, complain”), from Proto-West Germanic *karēn (“to complain”).
whirr
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Classic usage
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