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Classic usage
Reading level: hard
Estimated CEFR level: C2 — Proficiency
Estimated from word frequency; not an official CEFR classification.
From Middle English quaveren, frequentative form of quaven, cwavien (“to tremble”), equivalent to quave + -er. Cognate with Low German quabbeln (“to quiver”), German quabbeln, quappeln (“to quiver”). More at quave, quab, quiver.
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Classic usage
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