Morpheme
Growl
Type
free base
Denotation
rumble, grumble, deep sound
Etymology
Middle English groulen, grollen; probably from Old French grouler; probably of onomatopoeic origin
Evidence
growl, growled, growler, growlery, growlier, growliest, growliness, growling, growlingly, growls, growlsome, growly, undergrowl