To murmur or mutter with discontent; to make ill-natured complaints in a low voice and a surly manner.
- To complain in a surly manner; mutter discontentedly: "The governed will always find something to grumble about” ( Crane Brinton).
- To rumble or growl.
- To express in a grumbling discontented manner: grumbled a rude response.
- A muttered complaint.
- A rumble; a growl.