Growling or growl is a low, guttural vocalization produced by predatory animals as a warning to others, as a sign of aggression, or to express anger. Low or dull rumbling noises may also be emitted by human beings when discontent with something. The human sound is often termed "groaning". Grrr is an onomatopoeic word which imitates the growling sound of predatory animals, and is often used with other related meanings. It is one of the rare pronounceable words of the English language that consis… (More on Growling)