Where does “contrāstāre” come from?

contrāstāre (Latin) comes from Latin contrā, from Latin ubī, from Latin cubī, from Proto-Italic *kʷuðei.

Ancestry of “contrāstāre”, step by step

Step	Language	Word	Meaning
1	Latin	contrā	—
2	Latin	ubī	—
3	Latin	cubī	—
4	Proto-Italic	*kʷuðei	—

contrāstāre — Etymology, Origin & Word History | Etymology Explorer