English word hydro comes from Ancient Greek ὕδωρ

Detailed word origin of hydro

Dictionary entry	Language	Definition
ὕδωρ	Ancient Greek (grc)
hydro	English (eng)	(British, countable, dated) A spa.. (Canada, uncountable) electrical power supply; specifically : electrical power provided by a utility (as a publicly-owned one). (countable, aviation, obsolete). (uncountable) hydroelectric power Hydroelectric. Hydroponic.

Words with the same origin as hydro