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Classic usage
Estimated CEFR level: C2 — Proficiency
Estimated from word frequency; not an official CEFR classification.
From Middle English cloteren (“to form clots; coagulate; heap on”), from clot (“clot”), equivalent to clot + -er (frequentative suffix). Compare Welsh cludair (“heap, pile”), cludeirio (“to heap”).
jumble, muddle, fuddle, mare's nest, welter, smother
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Classic usage
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