Where does “εὐφορία” come from?

εὐφορία (Ancient Greek) comes from Ancient Greek εὔφορος, from Ancient Greek εὖ, from Ancient Greek ἐΰς, from Proto-Hellenic ehu-, from Proto-Indo-European h₁su-, from Proto-Indo-European h₁wes- — good; to be cheerful, happy; to eat, to feast.

εὐφορία (Ancient Greek): power of bearing/enduring easily; fertility