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Grumble (Verb)

Make complaining remarks or noises under one's breath; "she grumbles when she feels overworked".

Verbs of telling, asking, ordering, singing.

Show one's unhappiness or critical attitude; "He scolded about anything that he thought was wrong"; "We grumbled about the increased work load".

Verbs of telling, asking, ordering, singing.

Make a low noise; "rumbling thunder".

Verbs of seeing, hearing, feeling.

To utter or emit low dull rumbling sounds; "he grumbled a rude response"; "Stones grumbled down the cliff".

Verbs of telling, asking, ordering, singing.