Where does “meindre” come from?

meindre (Old French) comes from Latin minor, from Latin minae, from Proto-Italic *eksmenā.

Ancestry of “meindre”, step by step

Step	Language	Word	Meaning
1	Latin	minor	comparative degree of parvus; lesser, inferior,...
2	Latin	minae	projecting points, pinnacles, battlements,...
3	Proto-Italic	*eksmenā	—

meindre — Etymology, Origin & Word History | Etymology Explorer