Where does “ωφέλιμος” come from?

ωφέλιμος (Greek) comes from Ancient Greek ὠφέλιμος, from Ancient Greek ὠφελέω, from Ancient Greek -έω, from Proto-Indo-European -éyeti, from Proto-Indo-European -yeti — Creates transitive imperfective verbs from roots.

ωφέλιμος (Greek): beneficial, useful