Where does “ύπαιθρος” come from?

ύπαιθρος (Greek) comes from Ancient Greek ὕπαιθρος, from Ancient Greek ῠ̔πο-, from Ancient Greek ὑπό, from Proto-Indo-European upó, from Proto-Indo-European h₃ewp-.

ύπαιθρος (Greek): countryside

Definitions

countryside

Ancestry of “ύπαιθρος”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	ὕπαιθρος	under the sky, in the open air
2	Ancient Greek	ῠ̔πο-	under, lower; by, under; under”, “beneath
3	Ancient Greek	ὑπό
4	Proto-Indo-European	upó	under, below
5	Proto-Indo-European	h₃ewp-	—

Every word from Proto-Indo-European h₃ewp- →Every word from Proto-Indo-European upó →Every word from Ancient Greek ῠ̔πο- →