Where does “istær” come from?

istær (Old Danish) comes from Old Norse ístr, from Proto-Germanic *instraz — intestine.

Ancestry of “istær”, step by step

Step	Language	Word	Meaning
1	Old Norse	ístr	(intestinal) fat
2	Proto-Germanic	*instraz	intestine

Words derived from “istær”

Every word from Proto-Germanic *instraz →Every word from Old Norse ístr →