Where does “ardéirim” come from?

ardéirim (Irish) comes from Irish ard, from Old Irish ard, from Proto-Celtic ardwos, from Proto-Indo-European h₃erdʰwós, from Proto-Indo-European h₃erdʰ-, from Proto-Indo-European -wós — Creates adjectives from verb stems.

ardéirim (Irish): genius

Definitions

genius

Ancestry of “ardéirim”, step by step

ardéirim traces back through two separate lines of ancestry.

via Irish ard

Step	Language	Word	Meaning
1	Irish	ard	high, tall; loud; ambitious
2	Old Irish	ard	high; height
3	Proto-Celtic	ardwos	high
4	Proto-Indo-European	h₃erdʰwós	—
5	Proto-Indo-European	h₃erdʰ-	to increase, grow; upright, high
6	Proto-Indo-European	-wós	Creates adjectives from verb stems

via Irish éirim

Step	Language	Word	Meaning
1	Irish	éirim	riding, driving; course, gallop; movement,...
2	Old Irish	érimm	—

Every word from Proto-Indo-European -wós →Every word from Proto-Indo-European h₃erdʰ- →Every word from Proto-Indo-European h₃erdʰwós →