GRUM'BLE, verb intransitive [Heb. to roar, murmur, thunder.]
1. To murmur with discontent; to utter a low voice by way of complaint.
L'Avare, not using half his store,
Still grumbles that he has no more.
2. To growl; to snarl; as a lion grumbling over his prey.
3. To rumble; to roar; to make a harsh and heavy sound; as grumbling thunder; a grumbling storm. [In this sense, rumble is generally used.]