Where does “air” come from?

air (Scottish Gaelic) comes from Old Irish for, from Proto-Celtic *uɸer, from Proto-Indo-European upér, from Proto-Indo-European upó, from Proto-Indo-European h₃ewp-.

air (Scottish Gaelic): on, upon; of, concerning; for, on account of

Definitions

on, upon; of, concerning; for, on account of

Ancestry of “air”, step by step

air traces back through two separate lines of ancestry.

via Old Irish for

Step	Language	Word	Meaning
1	Old Irish	for	your; you; For quotations using this term, see...
2	Proto-Celtic	*uɸer	on, over, above
3	Proto-Indo-European	upér	above; over
4	Proto-Indo-European	upó	under, below
5	Proto-Indo-European	h₃ewp-	—

via Scottish Gaelic thar

Step	Language	Word	Meaning
1	Scottish Gaelic	thar	over, across; beyond
2	Old Irish	tar	over, across
3	Old Irish	a	nominative/accusative singular neuter of in; that...
4	Proto-Celtic	*ā	O (vocative particle)
5	Proto-Indo-European	ō	oh, ah

Words derived from “air”

Every word from Proto-Indo-European h₃ewp- →Every word from Proto-Indo-European upó →Every word from Proto-Indo-European upér →