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Classic usage
Estimated CEFR level: C2 — Proficiency
Estimated from word frequency; not an official CEFR classification.
From Dutch quacksalver (“a hawker of salve”) (now spelt kwakzalver), derived from Middle Dutch quacsalven (noun or verb), from kwaken (“to boast, to brag; to croak”) + salve (“ointment, salve”) (modern Dutch zalf) + -er (agent noun suffix).
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Classic usage
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