Where does “tükäl” come from?

tükäl (Bashkir) comes from Proto-Turkic tüke- — to come to an end; to finish, to complete.

Ancestry of “tükäl”, step by step

Step	Language	Word	Meaning
1	Proto-Turkic	tüke-	to come to an end; to finish, to complete

tükäl — Etymology, Origin & Word History | Etymology Explorer