Where does “quad-” come from?
quad- (English) comes from English quadri-, from Latin quattŭor, from Portuguese quarto, from Old Portuguese quarto, from Latin quārtus, from Proto-Indo-European kʷeturtos, from Proto-Indo-European kʷetwóres, from Proto-Indo-European kʷe- — and.
quad- (English): Involving four elements
Ancestry of “quad-”, step by step
Words derived from “quad-”