Where does “*háčaH” come from?

*háčaH (Proto-Iranian) comes from Proto-Indo-European sekʷ- — to follow; to see; to say.

Ancestry of “*háčaH”, step by step

Step	Language	Word	Meaning
1	Proto-Indo-European	sekʷ-	to follow; to see; to say

*háčaH — Etymology, Origin & Word History | Etymology Explorer