hydro-, hydra-, hydr-, hyd-

(Greek: water)

thymohydroquinone
A substance occurring in the urine after the ingestion of thymol that colors the urine green.
zymohydrolosis (s) (noun), zymohydroloses (pl)
Fermentation or the process by which complex organic compounds; such as, glucose, are broken down by the action of enzymes into simpler compounds without the use of oxygen.

Cross references of word families that refer to "water": aqua-; hydat-; hygro-.