From Middle English twinen, twynen, from Old English *twīnian (“to twine, thread”), from Proto-Germanic *twiznōną (“to thread”), from Proto-Indo-European *dwisnós (“double”), from Proto-Indo-European *dwóh₁ (“two”). Cognate with Dutch twijnen (“to twine, contort, throw”), Danish tvinde (“to twist”), Swedish tvinna (“to twist, twine, throw”), Icelandic tvinna (“to merge, twine”).