Where does “contraire” come from?

contraire (Old French) comes from Latin contrarius, from Latin contrā, from Latin ubī, from Latin cubī, from Proto-Italic *kʷuðei.

Ancestry of “contraire”, step by step

Step	Language	Word	Meaning
1	Latin	contrarius	opposite, opposed, contrary, conflicting,...
2	Latin	contrā	—
3	Latin	ubī	—
4	Latin	cubī	—
5	Proto-Italic	*kʷuðei	—

contraire — Etymology, Origin & Word History | Etymology Explorer