noun
a loud low dull continuous noise
Synonyms
Examples
- they heard the rumbling of thunder
noun
a complaint uttered in a low and indistinct tone
Synonyms
verb
show one's unhappiness or critical attitude
Synonyms
Examples
- He scolded about anything that he thought was wrong
- We grumbled about the increased work load
verb
make complaining remarks or noises under one's breath
Synonyms
Examples
- she grumbles when she feels overworked
verb
to utter or emit low dull rumbling sounds
Synonyms
Examples
- he grumbled a rude response
- Stones grumbled down the cliff
verb
make a low noise
Synonyms
Examples
- rumbling thunder