Where does “gāris” come from?

gāris (Proto-Celtic) comes from Proto-Indo-European ǵeh₂r- — to shout, cry; exclamation; voice; to call, cry.

Ancestry of “gāris”, step by step

Step	Language	Word	Meaning
1	Proto-Indo-European	ǵeh₂r-	to shout, cry; exclamation; voice; to call, cry

gāris — Etymology, Origin & Word History | Etymology Explorer