Meaning

noun the sound of growling (as made by animals)

verb to utter or emit low dull rumbling sounds

originFrom Middle English groulen, grollen, gurlen (“of the bowels: to growl, rumble”), either possibly from Old French groler (variant of croler (“to be agitated, shake”)), grouler, grouller (“to growl, grumble”), from Frankish *grullen, *gruljan or from Old English gryllan, both from Proto-Germanic *gruljaną (“to make a sound; to growl, grumble, rumble”), from Proto-Indo-European *gʰer- (“to make a…

Etymology from Wiktionary, CC BY-SA 3.0