Where does “áirigh” come from?

áirigh (Irish) comes from Old Irish ad·rími, from Proto-Celtic rīmā, from Proto-Indo-European h₂rey-, from Proto-Indo-European h₂er- — to fit, to fix, to put together.

áirigh (Irish): count, reckon

Definitions

count, reckon

Ancestry of “áirigh”, step by step

áirigh traces back through 3 separate lines of ancestry.

via Old Irish ad·rími

Step	Language	Word	Meaning
1	Old Irish	ad·rími	counts, numbers, computes; records, recounts,...
2	Proto-Celtic	rīmā	number
3	Proto-Indo-European	h₂rey-	to count, count out; to arrange
4	Proto-Indo-European	h₂er-	to fit, to fix, to put together

via Old Irish airigidir

Step	Language	Word	Meaning
1	Old Irish	airigidir	to perceive, sense, feel
2	Old Irish	aire	freeman; noble
3	Proto-Celtic	aryos	freeman, noble
4	Proto-Indo-European	h₂éry-o-s	host

via Old Irish áirge

Step	Language	Word	Meaning
1	Old Irish	áirge	a place for milking cows
2	Old Irish	árach	act of binding, guaranteeing ; bond, guarantee

Words derived from “áirigh”

Every word from Proto-Indo-European h₂er- →Every word from Proto-Indo-European h₂rey- →Every word from Proto-Celtic rīmā →