Where does “وار” come from?

وار (Old Anatolian Turkish) comes from Proto-Turkic bār — there is/are, there exist; there is, there are.

Ancestry of “وار”, step by step

Step	Language	Word	Meaning
1	Proto-Turkic	bār	there is/are, there exist; there is, there are

وار — Etymology, Origin & Word History | Etymology Explorer