Where does “murmor” come from?

murmor (Middle English) comes from Old French murmure, from Latin murmur, from Proto-Indo-European mormur-.

murmor (Middle English): Alternative form of murmur

Definitions

Step	Language	Word	Meaning
1	Old French	murmure	—
2	Latin	murmur	murmur, murmuring; humming, roaring, growling,...
3	Proto-Indo-European	mormur-	—

murmor — Etymology, Origin & Word History | Etymology Explorer