Where does “catena” come from?

catena (Latin) comes from Proto-Indo-European kat- — cub; to weave, to braid; to link or weave...

Ancestry of “catena”, step by step

Step	Language	Word	Meaning
1	Proto-Indo-European	kat-	cub; to weave, to braid; to link or weave...

catena — Etymology, Origin & Word History | Etymology Explorer