To murmur or mutter with discontent; to make ill-natured complaints in a low voice and a surly manner.
To growl; to snarl in deep tones; as, a lion grumbling over his prey.
To rumble; to make a low, harsh, and heavy sound; to mutter; as, the distant thunder grumbles.
To express or utter with grumbling.
The noise of one that grumbles.
A grumbling, discontented disposition.
a loud low dull continuous noise; "they heard the rumbling of thunder"
a complaint uttered in a low and indistinct tone
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; "rumbling thunder"