grumbles

/G R AH1 M B AH0 L Z/
noun
  1. 1

    A low thundering, rumbling or growling sound.

  2. 2

    The sound made by a hungry stomach.

  3. 3

    A surly complaint.

    โ€œThat whiner is never without a grumble to share.โ€

verb
  1. 1

    To make a low, growling or rumbling noise, like a hungry stomach or certain animals.

    โ€œThe distant thunder grumbles.โ€

  2. 2

    To complain; to murmur or mutter with discontent; to make ill-natured complaints in a low voice and a surly manner.

    โ€œHe grumbles about the food constantly, but has yet to learn to cook.โ€

  3. 3

    To utter in a grumbling fashion.

Source: https://en.wiktionary.org/wiki/grumble, https://en.wiktionary.org/wiki/grumbles