myEtymology.com: Greek etymology of hippopotamos

Etymology of the Greek word hippopotamos (ἱπποπόταμος)

the Greek word hippopotamos, ἱπποπόταμος

derived from the Greek word hippos, ἵππος (horse; a horse)

derived from the Proto-Indo-European root *ekwo-

derived from the Greek word potamos, ποταμός (a current, brook or freshet (as drinkable); running water)

derived from the Proto-Indo-European root *pet-