Where does “jalouse” come from?

jalouse (English) comes from Scots jalouse, from Old French jalouser — to be jealous of.

jalouse (English): To suspect; To be jealous of

Definitions

Step	Language	Word	Meaning
1	Scots	jalouse	to guess, suspect, infer, be suspicious of, to...
2	Old French	jalouser	to be jealous of

jalouse — Etymology, Origin & Word History | Etymology Explorer