Where does “eitlíocht” come from?

eitlíocht (Irish) comes from Irish eitil, from English ethyl, from Ancient Greek Αἰθήρ, from Ancient Greek αἴθω, from Proto-Hellenic *áitʰō — to ignite.

eitlíocht (Irish): aviation

Definitions

aviation

Ancestry of “eitlíocht”, step by step

Step	Language	Word	Meaning
1	Irish	eitil	ethyl; fly, flutter; flicker
2	English	ethyl	The univalent hydrocarbon radical, CH, formally...
3	Ancient Greek	Αἰθήρ	Upper Air
4	Ancient Greek	αἴθω	To ignite, kindle, light; To burn, blaze
5	Proto-Hellenic	*áitʰō	to ignite

Every word from Proto-Hellenic *áitʰō →Every word from Ancient Greek αἴθω →Every word from Ancient Greek Αἰθήρ →