Where does “захар” come from?

захар (Bulgarian) comes from Greek ζάχαρη, from Byzantine Greek ζάχαρις.

захар (Bulgarian): sugar

Definitions

Step	Language	Word	Meaning
1	Greek	ζάχαρη	sugar, sucrose
2	Byzantine Greek	ζάχαρις	—

захар — Etymology, Origin & Word History | Etymology Explorer