Where does “*kaŕguk” come from?

*kaŕguk (Proto-Turkic) comes from Proto-Turkic kaŕ- — to dig, scrape, plane; to dig out.

Ancestry of “*kaŕguk”, step by step

Step	Language	Word	Meaning
1	Proto-Turkic	kaŕ-	to dig, scrape, plane; to dig out

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