grumble

grumble is a   Verb

Definition:

[1] To murmur or mutter with discontent; to make ill-natured complaints in a low voice and a surly manner. L`Avare, not using half his store, Still grumbles that he has no more. Prior.

[2] To growl; to snarl in deep tones; as, a lion grumbling over his prey.

[3] To rumble; to make a low, harsh, and heavy sound; to mutter; as, the distant thunder grumbles.

Synonyms: