Etymology, English, Twain
Etymology Numeral. From Middle English tweyne, tweien, twaine, from Old English twēġen m (“two”), from Proto-West Germanic *twai-, from Proto-Germanic *twai, from Proto-Indo-European *dwóh₁. Cognate with Saterland Frisian twäin, Low German twene, German zween, Swedish tvenne . The word outlasted the breakdown of gender in Middle English and survived as a…