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Classic usage
Estimated CEFR level: C2 — Proficiency
Estimated from word frequency; not an official CEFR classification.
From Middle English knop, from Middle Low German and Middle Dutch knoppe, from Proto-Germanic *knuppô, *knuppaz, *knappô, which is perhaps related to *knappō (“knob, boy”). Possible doublet of knave and knob.
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Classic usage
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