Where does “υφήλιος” come from?

υφήλιος (Greek) comes from Ancient Greek ὑφήλιος, from Ancient Greek Ἥλιος, from Ancient Greek τύπος, from Ancient Greek τύπτω, from Proto-Indo-European (s)tewp-, from Proto-Indo-European (s)tew- — to push, to hit.

υφήλιος (Greek): world