grumble
//ˈɡɹʌm.bəl//
Verb
grumbleInfinitive
grumblePresent tense
grumbledPast tense
grumbledPast participle
grumblingPresent participle
grumblesThird-person singular
1
To complain or protest about something in a bad-tempered but typically muted way.
He grumbled about the long wait at the restaurant.
2
To make a low rumbling sound, like distant thunder.
Thunder grumbled in the distance.
Noun
1
A complaint uttered in a low, discontented manner.
She let out a grumble about the long wait.
2
A low rumbling sound.
We heard the grumble of thunder in the distance.