Where does “acraiteilm” come from?

acraiteilm (Irish) comes from Irish acra-, from Ancient Greek ἄκρος, from Ancient Greek ὦμος, from Proto-Indo-European h₃émōs — shoulder.

acraiteilm (Irish): acrotelm

Definitions

Step	Language	Word	Meaning
1	Irish	acra-	acro-
2	Ancient Greek	ἄκρος	At the edge, extreme, beginning, end: outermost;...
3	Ancient Greek	ὦμος	the shoulder with the upper arm
4	Proto-Indo-European	h₃émōs	shoulder