Where does “ireux” come from?

ireux (Middle French) comes from Old French irous, from Latin irosus, from Latin -ōsus, from Old Latin -ōssus.

ireux (Middle French): angry; irate

Definitions

Step	Language	Word	Meaning
1	Old French	irous	enraged; furious; very angry
2	Latin	irosus	—
3	Latin	-ōsus	—
4	Old Latin	-ōssus	—

ireux — Etymology, Origin & Word History | Etymology Explorer