Where does “gromъ” come from?

gromъ (Proto-Slavic) comes from Proto-Indo-European gʰrom-o-, from Proto-Indo-European gʰrem-, from Proto-Indo-European gʰer- — to rub; to stroke; to grind.

gromъ (Proto-Slavic): thunder

Definitions

thunder

Ancestry of “gromъ”, step by step

Step	Language	Word	Meaning
1	Proto-Indo-European	gʰrom-o-	—
2	Proto-Indo-European	gʰrem-	to be angry; to sound, bellow, growl, roar, be...
3	Proto-Indo-European	gʰer-	to rub; to stroke; to grind

Words derived from “gromъ”

гром
громовержец
громоотвод
Grom
Gromny
grom
гром
grom
hrom
hromosvod
ohromit
ohromený
гром
grom
грьмѣти
громъ

Every word from Proto-Indo-European gʰer- →

gromъ — Etymology, Origin & Word History | Etymology Explorer