Where does “mesure” come from?

mesure (Middle English) comes from Old French mesure, from Latin mēnsūra, from Latin mētior, from Proto-Indo-European meh₁- — to measure.

Ancestry of “mesure”, step by step

Step	Language	Word	Meaning
1	Old French	mesure	—
2	Latin	mēnsūra	—
3	Latin	mētior	—
4	Proto-Indo-European	meh₁-	to measure

mesure — Etymology, Origin & Word History | Etymology Explorer