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Classic usage
Reading level: hard
Estimated CEFR level: C1 — Advanced
Estimated from word frequency; not an official CEFR classification.
From Middle English twyn, twyne, twin, from Old English twīn (“double thread, twist, twine, linen-thread, linen”), from Proto-West Germanic *twiʀn (“thread, twine”), from Proto-Germanic *twiznaz, from Proto-Indo-European *dwisnós (“double”), from *dwóh₁ (“two”).
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Classic usage
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