Where does “громъ” come from?

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

громъ (Old Church Slavonic): thundering

Definitions

  1. thundering

Ancestry of “громъ”, step by step

StepLanguageWordMeaning
1Proto-Slavicgromъthunder
2Proto-Indo-Europeangʰrom-o-—
3Proto-Indo-Europeangʰrem-to be angry; to sound, bellow, growl, roar, be...
4Proto-Indo-Europeangʰer-to rub; to stroke; to grind
Every word from Proto-Indo-European gʰer- →Every word from Proto-Indo-European gʰrem- →Every word from Proto-Indo-European gʰrom-o- →