gʰrem-

“to be angry, thunder, roar”

Widely acceptedemotionsoundweather

Source of English grim, grime, Latin fremere

Root for angry roaring, yielding English grim, grime and Latin fremere (to roar).‌‍‌‌‌‌‌‌‌‌‌‍‍‌‍‌‍‌‍‍‍‌‍‍‍‍‌‌‌‍‌‌

(H)meyǵʰ-“to urinate, to mist”(s)teh₂n-“to thunder”(s)tenh₂-“to crash, to thunder”bʰerǵʰ-tó-“raised up, elevated, proud”bʰleh₁-k-“to cry out, to bleat”bʰleh₁-s-“to blow, to blast”bʰleḱ-“to flash, lightning flash”bʰormo-“to buzz, murmur, drone”