📖 WordNook

grumble

noun
  1. a complaint uttered in a low and indistinct tone
    grumbling
  2. a loud low dull continuous noise
    rumble
verb
  1. make complaining remarks or noises under one's breath
    “They grumble when they feel overworked.”
    murmur
  2. show one's unhappiness or critical attitude
    grouchscold
  3. to utter or emit low dull rumbling sounds
    “I grumbled a rude response into my drink.”
    rumble
  4. make a low noise
    rumble