grumble

Meanings

Noun

• a loud low dull continuous noise
• a complaint uttered in a low and indistinct tone

Verb

• show one's unhappiness or critical attitude
  • "We grumbled about the increased work load"
• make complaining remarks or noises under one's breath
  • "she grumbles when she feels overworked"
• to utter or emit low dull rumbling sounds
  • "he grumbled a rude response"
  • "Stones grumbled down the cliff"
• make a low noise

Synonyms

croak, gnarl, grouch, growl, grumbling, murmur, murmuring, mutter, muttering, rumble, rumbling, scold