grumbling

/ˈɡrʌmblɪŋ/
adjective
  1. Tending to complain or express dissatisfaction in a low, muttering way.
    • She gave a grumbling reply and walked away.
    • The grumbling workers refused to start the project without a break.
    • The grumbling customers finally left the store after a long wait.
  2. Making a low, rumbling sound.
    • A grumbling sound came from the cave, making us stop.
    • The grumbling engine needed a tune-up.
    • The grumbling thunder signaled the approaching storm.
noun
  1. The act or sound of complaining in a low, muttering voice.
    • The grumbling from the back of the room grew louder as the meeting went on.
    • His grumbling was so quiet that no one could hear exactly what he said.
    • There was constant grumbling among the passengers about the delayed flight.
  2. A low, rumbling sound, especially from thunder or machinery.
    • The grumbling of distant thunder made the children nervous.
    • We could hear the grumbling of the old refrigerator from the kitchen.
    • The grumbling of the volcano warned of an imminent eruption.
Antonyms
What does "grumbling" mean? | whatsthatwordmean | whatsthatwordmean