Where does “bojati” come from?

bojati (Proto-Slavic) comes from Proto-Indo-European bʰeyh₂- — to fear, be afraid; to strike, hit; to hew, cut.

Ancestry of “bojati”, step by step

Step	Language	Word	Meaning
1	Proto-Indo-European	bʰeyh₂-	to fear, be afraid; to strike, hit; to hew, cut

bojati — Etymology, Origin & Word History | Etymology Explorer