Where does “excédentaire” come from?

excédentaire (French) comes from French -aire, from Latin -ārius, from Proto-Italic *-āzios.

excédentaire (French): surplus, excess

Definitions

Step	Language	Word	Meaning
1	French	-aire	-ary; -aire
2	Latin	-ārius	—
3	Proto-Italic	*-āzios	—

excédentaire — Etymology, Origin & Word History | Etymology Explorer