growl (v.)youdaoicibaDictYouDict[growl 词源字典]
1660s, from Middle English grollen "to rumble, growl" (early 15c.), from Old French grouler "to rumble," said to be from Frankish; probably ultimately of imitative origin. Related: Growled; growling. The noun is 1727, from the verb.[growl etymology, growl origin, 英语词源]