Where does “wrti-” come from?

wrti- (Proto-Indo-European) comes from Proto-Indo-European wert-, from Proto-Indo-European wer- — to burn; to cover, heed, notice; squirrel.

Ancestry of “wrti-”, step by step

Step	Language	Word	Meaning
1	Proto-Indo-European	wert-	to turn, to rotate
2	Proto-Indo-European	wer-	to burn; to cover, heed, notice; squirrel

wrti- — Etymology, Origin & Word History | Etymology Explorer