Where does “æther” come from?

æther (French) comes from French éther, from Latin aetherius, from Ancient Greek αἰθέριος, from Ancient Greek Αἰθήρ, from Ancient Greek αἴθω, from Proto-Hellenic *áitʰō — to ignite.

æther (French): Archaic form of éther

Definitions

Archaic form of éther

Ancestry of “æther”, step by step

Step	Language	Word	Meaning
1	French	éther	ether
2	Latin	aetherius	Of or pertaining to the ether, the sky, or the...
3	Ancient Greek	αἰθέριος	of or pertaining to the upper air; ethereal,...
4	Ancient Greek	Αἰθήρ	Upper Air
5	Ancient Greek	αἴθω	To ignite, kindle, light; To burn, blaze
6	Proto-Hellenic	*áitʰō	to ignite

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