Grumble

Part of speech: noun (n.)

1. The noise of one that grumbles.

2. A grumbling, discontented disposition. A bad case of grumble. Mrs. H. H. Jacksn.

Part of speech: verb (v.)

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.

Part of speech: verb (v.)

To express or utter with grumbling.