Where does “ἐξω-” come from?

ἐξω- (Ancient Greek) comes from Ancient Greek ἐξ, from Ancient Greek Ὕπνος, from Proto-Hellenic húpnos, from Proto-Indo-European supnós, from Proto-Indo-European swóp-r̥ ~ swép-n̥s, from Proto-Indo-European swep- — to sleep.

ἐξω- (Ancient Greek): outside

Definitions

  1. outside

Ancestry of “ἐξω-”, step by step

StepLanguageWordMeaning
1Ancient GreekἐξAlternative form of ἐκ; out; from, out of
2Ancient GreekὝπνοςHypnos, the Greek mythological god of sleep
3Proto-Hellenichúpnos—
4Proto-Indo-Europeansupnóssleep; death
5Proto-Indo-Europeanswóp-r̥ ~ swép-n̥s—
6Proto-Indo-Europeanswep-to sleep
Every word from Proto-Indo-European swep- →Every word from Proto-Indo-European swóp-r̥ ~ swép-n̥s →Every word from Proto-Indo-European supnós →