Where does “бачити” come from?

бачити (Serbo-Croatian) comes from Serbo-Croatian bačiti, from Proto-Slavic bačiti.

Ancestry of “бачити”, step by step

Step	Language	Word	Meaning
1	Serbo-Croatian	bačiti	to throw, cast; to throw out, discard; to throw...
2	Proto-Slavic	bačiti	—

бачити — Etymology, Origin & Word History | Etymology Explorer