PIE word
*dwóh₁
From Middle English widwe, from Old English widuwe, from Proto-West Germanic *widuwā, from Proto-Germanic *widuwǭ, from Proto-Indo-European *h₁widʰéwh₂, possibly from *h₁weydʰh₁-, *widʰ- (“to separate, split, cleave, divide”), whence also wood from Old English widu, wudu.
Cognates
Cognates include Cimbrian bittaba (“widow”), Dutch weduwe, weeuw (“widow”), German Witwe (“widow”), Vilamovian wytwa (“widow”), Gothic 𐍅𐌹𐌳𐌿𐍅𐍉 (widuwō, “widow”); also Old Irish fedb (“widow”), Welsh gweddw (“widow”), Latin vidua (“widow”), Ancient Greek ἠΐθεος (ēḯtheos, “bachelor”), Albanian ve (“widow, widower”), Belarusian удава́ (udavá, “widow”), Czech, Slovak, and Slovene vdova (“widow”), Polish gdowa, wdowa (“widow”), Russian and Ukrainian вдова́ (vdová, “widow”), Serbo-Croatian udova, у̀дова (“widow”), Central Kurdish بێوە (bêwe, “widow”), Ossetian идӕдз (idæʒ, “widowed”), Persian بیوه (bive, bêva, “widow”), Sanskrit विधवा (vidhavā, “widow”).