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Noun: grumbling  grúm-b(u-)ling
  1. A loud low dull continuous noise
    "they heard the grumbling of thunder";
    - rumble, rumbling, grumble
  2. A complaint uttered in a low and indistinct tone
    - grumble, murmur, murmuring, mutter, muttering
Adjective: grumbling  grúm-b(u-)ling
  1. Continuous full and low-pitched throbbing sound
    "the grumbling rolling sound of thunder";
    - rumbling
Verb: grumble  grúm-bul
  1. Show one's unhappiness or critical attitude
    "We grumbled about the increased work load";
    - grouch, scold, moan
  2. Make complaining remarks or noises under one's breath
    "she grumbles when she feels overworked";
    - murmur, mutter, croak, gnarl, chunter [Brit]
  3. To utter or emit low dull rumbling sounds
    "he grumbled a rude response"; "Stones grumbled down the cliff";
    - growl, rumble
  4. Make a low noise
    "grumbling thunder";
    - rumble

Derived forms: grumblings

See also: full

Type of: complain, complaint, emit, go, kick, kvetch [N. Amer], let loose, let out, moan, noise, plain [archaic], quetch, sound, sound off, utter

Encyclopedia: Grumbling