Answer:
Followed by a frightening or unfriendly low noise.
Explanation:
A growl is a frightening or unfriendly low noise. This word usually refers to the sound animals make when they are feeling threatened or exhibiting aggression. However, it can refer to other things as well, for example, a low unpleasant noise coming from thunder or a machine. We can even say that a person who is saying something in an unfriendly and angry way is growling.
