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Classic usage
Reading level: hard
Estimated CEFR level: B1 — Intermediate
Estimated from word frequency; not an official CEFR classification.
From Middle English fever, fevere, from Old English fefer, fefor (“fever”) and Old French fievre (“fever”), from Latin febris (“a fever”), from Proto-Indo-European *dʰegʷʰ- (“to burn”). Displaced native Old English hriþ (“fever”). Compare also Saterland Frisian Fiewer, German Fieber, Danish feber, Swedish feber.
febrility, febricity, pyrexia, feverishness
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Classic usage
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