Where does “υπόγειο” come from?

υπόγειο (Greek) comes from Greek υπόγειος, from Ancient Greek ὑπόγειος, from Ancient Greek ῠ̔πο-, from Ancient Greek ὑπό, from Proto-Indo-European upó, from Proto-Indo-European h₃ewp-.

υπόγειο (Greek): basement, cellar;...

Definitions

basement, cellar;...

Ancestry of “υπόγειο”, step by step

Step	Language	Word	Meaning
1	Greek	υπόγειος	underground, metro; underground, subterranean,...
2	Ancient Greek	ὑπόγειος	underground, subterranean, chthonian
3	Ancient Greek	ῠ̔πο-	under, lower; by, under; under”, “beneath
4	Ancient Greek	ὑπό
5	Proto-Indo-European	upó	under, below
6	Proto-Indo-European	h₃ewp-	—

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