Where does “idro-” come from?

idro- (Italian) comes from Ancient Greek ὑδρο-, from Ancient Greek ὕδωρ, from Proto-Hellenic *údōr.

idro- (Italian): hydro-

Definitions

Step	Language	Word	Meaning
1	Ancient Greek	ὑδρο-	hydro-, water; water
2	Ancient Greek	ὕδωρ	water; rainwater, rain; sweat
3	Proto-Hellenic	*údōr	—

idro- — Etymology, Origin & Word History | Etymology Explorer