Where does “प्रछ्” come from?

प्रछ् (Sanskrit) comes from Proto-Indo-European preḱ-, from Proto-Indo-European pr̥ḱneh₂.

Ancestry of “प्रछ्”, step by step

Step	Language	Word	Meaning
1	Proto-Indo-European	preḱ-	to ask
2	Proto-Indo-European	pr̥ḱneh₂	—

प्रछ् — Etymology, Origin & Word History | Etymology Explorer