Where does “ポグロム” come from?

ポグロム (Japanese) comes from Russian погро́м, from Russian громи́ть, from Proto-Slavic *gromiti.

ポグロム (Japanese): pogrom

Definitions

Step	Language	Word	Meaning
1	Russian	погро́м	pogrom, massacre
2	Russian	громи́ть	to smash, to sack
3	Proto-Slavic	*gromiti	—

ポグロム — Etymology, Origin & Word History | Etymology Explorer