Where does “cosantóir” come from?

cosantóir (Irish) comes from Irish -tóir, from Old Irish -, from Latin -tor, from Proto-Italic -tōr, from Proto-Indo-European -tōr, from Proto-Indo-European -tor-s.

cosantóir (Irish): defender, protector; defendant; back

Definitions

defender, protector; defendant; back

Ancestry of “cosantóir”, step by step

Step	Language	Word	Meaning
1	Irish	-tóir	-er
2	Old Irish	-	—
3	Latin	-tor	-er
4	Proto-Italic	-tōr	Forms agent nouns to verb stems
5	Proto-Indo-European	-tōr	Derives agent nouns from verbs, denoting someone...
6	Proto-Indo-European	-tor-s	—

Words derived from “cosantóir”

banchosantóir

Every word from Proto-Indo-European -tor-s →Every word from Latin -tor →Every word from Irish -tóir →