Grumble

Grum´ble

v. i.	1.	To murmur or mutter with discontent; to make ill-natured complaints in a low voice and a surly manner. [imp. & p. p. Grunbled ; p. pr. & vb. n. Grumbling .] L'Avare, not using half his store, Still grumbles that he has no more. - Prior.
	2.	To growl; to snarl in deep tones; as, a lion grumbling over his prey.
	3.	To rumble; to make a low, harsh, and heavy sound; to mutter; as, the distant thunder grumbles.
v. t.	1.	To express or utter with grumbling.
n.	1.	The noise of one that grumbles.
	2.	A grumbling, discontented disposition. A bad case of grumble. - Mrs. H. H. Jackson.

Noun	1.	grumble - a loud low dull continuous noise; "they heard the rumbling of thunder" Synonyms: grumbling, rumble, rumbling
	2.	grumble - a complaint uttered in a low and indistinct tone Synonyms: grumbling, murmuring, mutter, muttering, murmur
Verb	1.	grumble - show one's unhappiness or critical attitude; "He scolded about anything that he thought was wrong"; "We grumbled about the increased work load" Synonyms: grouch, scold
	2.	grumble - make complaining remarks or noises under one's breath; "she grumbles when she feels overworked" Synonyms: gnarl, murmur, mutter, croak
	3.	grumble - to utter or emit low dull rumbling sounds; "he grumbled a rude response"; "Stones grumbled down the cliff" Synonyms: growl, rumble
	4.	grumble - make a low noise; "rumbling thunder" Synonyms: rumble