Where does “tumultueux” come from?

tumultueux (French) comes from Latin tumultuōsus, from Latin -ōsus, from Old Latin -ōssus.

tumultueux (French): tumultuous

Definitions

Step	Language	Word	Meaning
1	Latin	tumultuōsus	—
2	Latin	-ōsus	—
3	Old Latin	-ōssus	—

tumultueux — Etymology, Origin & Word History | Etymology Explorer