Where does “ἕλικος” come from?

ἕλικος (Ancient Greek) comes from Ancient Greek ἕλιξ, from Ancient Greek πτερόν, from Proto-Indo-European péth₂r̥, from Proto-Indo-European peth₂- — to spread out; to fly.

Ancestry of “ἕλικος”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	ἕλιξ	Anything twisted, winding, or spiral; The tendril...
2	Ancient Greek	πτερόν	feather; wing; Any winged creature
3	Proto-Indo-European	péth₂r̥	wing; feather
4	Proto-Indo-European	peth₂-	to spread out; to fly

Words derived from “ἕλικος”

helicopter
antihelicopter
helicopterlike
helicóptero
elicottero
hélicoptère
hélisurface
hélitransporter
héli-
hélitreuiller
hélitreuillage
Helikopter
Helikopterrotor
anti-helicóptero
helicóptero
helikopterilentäjä
taisteluhelikopteri
helikopteri
helikopters
ヘリコプター
politiehelikopter
helikopter
helikopter
helikopter

Every word from Proto-Indo-European peth₂- →

ἕλικος — Etymology, Origin & Word History | Etymology Explorer