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Classic usage
Estimated CEFR level: C2 — Proficiency
Estimated from word frequency; not an official CEFR classification.
From earlier wabble (“wobble”), probably from Low German wabbeln (“to wobble”). Compare Dutch wiebelen and wobbelen (“to wobble”), German wabbeln (“to wobble”), Old Norse vafla (“to hover about, totter”).
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Classic usage
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Verbault — Brown corpus levels, WordNet definitions, Gutenberg corpus.
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