Where does “खारा” come from?

खारा (Bhojpuri) comes from Sanskrit क्षार, from Proto-Indo-European kseros.

खारा (Bhojpuri): salty, saline

Definitions

Step	Language	Word	Meaning
1	Sanskrit	क्षार	salt, alkali; sharp, acrid, pungent; caustic,...
2	Proto-Indo-European	kseros	—

खारा — Etymology, Origin & Word History | Etymology Explorer