Synonyms of GRUMBLES

What is another word for GRUMBLES
1.

Synonyms of GRUMBLES

noun - a loud low dull continuous noise

noun - a complaint uttered in a low and indistinct tone

verb - show one's unhappiness or critical attitude

verb - make complaining remarks or noises under one's breath

verb - to utter or emit low dull rumbling sounds

verb - make a low noise