grumbling

grum·ble  (grmbl)

v. grum·bled, grum·bling, grum·bles

v.intr.

1. To complain in a surly manner; mutter discontentedly: "The governed will always find something to grumble about" (Crane Brinton).

2. To rumble or growl.

v.tr.

To express in a grumbling discontented manner: grumbled a rude response.

n.

1. A muttered complaint.

2. A rumble; a growl.

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[Probably Dutch grommelen, to mutter, from Middle Dutch, frequentative of grommen.]

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grumbler n.

grumbling·ly adv.

grumbly adj.

Thesaurus

Noun	1.	grumbling - a loud low dull continuous noise; "they heard the rumbling of thunder" grumble, rumble, rumbling noise - sound of any kind (especially unintelligible or dissonant sound); "he enjoyed the street noises"; "they heard indistinct noises of people talking"; "during the firework display that ended the gala the noise reached 98 decibels"
	2.	grumbling - a complaint uttered in a low and indistinct tone grumble, murmuring, mutter, muttering, murmur complaint - an expression of grievance or resentment
Adj.	1.	grumbling - continuous full and low-pitched throbbing sound; "the rumbling rolling sound of thunder" rumbling full - (of sound) having marked deepness and body; "full tones"; "a full voice"