Where does “ὠκύθοος” come from?

ὠκύθοος (Ancient Greek) comes from Ancient Greek θοός, from Ancient Greek θέω, from Ancient Greek θεϝ-, from Proto-Indo-European dʰew- — to die, pass away; to run, flow.

ὠκύθοος (Ancient Greek): swift running

Definitions

swift running

Ancestry of “ὠκύθοος”, step by step

ὠκύθοος traces back through two separate lines of ancestry.

via Ancient Greek θοός

Step	Language	Word	Meaning
1	Ancient Greek	θοός	quick, swift; sharp, pointed
2	Ancient Greek	θέω	I run; I fly
3	Ancient Greek	θεϝ-	—
4	Proto-Indo-European	dʰew-	to die, pass away; to run, flow

via Ancient Greek ὠκῠ́ς

Step	Language	Word	Meaning
1	Ancient Greek	ὠκῠ́ς	fast, swift, quick

Every word from Proto-Indo-European dʰew- →Every word from Ancient Greek θεϝ- →Every word from Ancient Greek θέω →