Where does “ход” come from?

ход (Bulgarian) comes from Proto-Slavic xodъ, from Proto-Indo-European sḗd-.

Ancestry of “ход”, step by step

Step	Language	Word	Meaning
1	Proto-Slavic	xodъ	motion, movement
2	Proto-Indo-European	sḗd-	—

ход — Etymology, Origin & Word History | Etymology Explorer