Reconstruction:Proto-Indo-European/kʷetwóres

Etymology
Considering PIE morpheme structure, *kʷetwor- has too many consonants to be a true primitive morpheme. Tentatively, the feminine stem could point to an elemental "four" of the shape **kʷet- or **kʷetu-.

Numeral

 * 1) four

Derived terms

 * *kʷetwr̥tos ~ *kʷetwr̥tHos
 * *kʷetwr̥tos ~ *kʷetwr̥tHos