From Middle English idroforbia (“hydrophobia”), from Latin hydrophobia, from Ancient Greek ὑδροφοβία (hudrophobía), from ὑδρο- (hudro-), combining form of ῠ̔́δωρ (hŭ́dōr, “water”), + φοβία (phobía, “phobia”). The word is analysable as hydro- + -phobia.