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Classic usage
Estimated CEFR level: C2 — Proficiency
Estimated from word frequency; not an official CEFR classification.
From Middle English gruen, probably from Middle Low German gruwen or Middle Dutch gruwen (compare Dutch gruwen), both from Proto-Germanic *grūwijaną, perhaps ultimately an imitative derivative of Proto-Indo-European *ǵʰers- (“to bristle”), or instead from *gʰer- (“to rub, stroke, grind”).
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Classic usage
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