Where does “cartilago” come from?

cartilago (Latin) comes from Proto-Indo-European kert-, from Proto-Turkic *keŕ-.

Ancestry of “cartilago”, step by step

Step	Language	Word	Meaning
1	Proto-Indo-European	kert-	times; to weave, twist together; time
2	Proto-Turkic	*keŕ-	—

cartilago — Etymology, Origin & Word History | Etymology Explorer