DICT.TW Dictionary Taiwan

 Grum·ble v. i. [imp. & p. p. Grunbled p. pr. & vb. n. Grumbling ]
 1. To murmur or mutter with discontent; to make ill-natured complaints in a low voice and a surly manner.
 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.