verb
- to complain in a bad-tempered way
- to make a low rumbling sound
noun
- a complaint expressed in a bad-tempered way
- a low rumbling sound
Examples
- The students began to grumble about the heavy homework load.
- He always grumbles when he has to wake up early.
- Thunder began to grumble in the distance.
- The old engine grumbled as it started up.
- She voiced her grumble about the poor service.
- We could hear the grumble of traffic outside.
- Stop your constant grumbling and help us solve the problem.