1. (n.) A low, confused, and indistinct sound, like that of running water.

2. (n.) A complaint half suppressed, or uttered in a low, muttering voice.

3. (v. i.) To make a low continued noise, like the hum of bees, a stream of water, distant waves, or the wind in a forest.

4. (v. i.) To utter complaints in a low, half-articulated voice; to feel or express dissatisfaction or discontent; to grumble; -- often with at or against.

5. (v. t.) To utter or give forth in low or indistinct words or sounds; as, to murmur tales.

air a grievance aspirate aspiration bark bated breath bawl beef bellow bellyache bitch blare blat blubber boom bray breath breathe breathy voice buzz buzzing cackle chant chirp clamor complain complaining complaint coo crab croak crow cry dolorous tirade drawl drone droning exclaim exhalation flute fret fret and fume fumble fuss gabble gasp gibber gossip grapevine gripe groan grouch grouse grousing growl grumble grumbling grunt hearsay hiss holler howl hum humming jabber jeremiad keen kick lament lilt little voice lodge a complaint low voice maffle maunder moan mouth muddle mumble mumbling murmuration murmuring mussitate mutter muttering outcry pant pipe plaint planctus purr raise a howl register a complaint repine roar rumble rumbling rumor scold scream screech scuttlebutt shriek sibilate sigh sing snap snarl snort sob soft voice sough speak incoherently splutter sputter squall squawk squeal stage whisper still small voice susurrate susurration susurrus swallow take on talk thunder tirade trumpet twang ululation underbreath undercurrent undertone wail wail of woe warble whimper whine whisper whispering whistle yap yawp yell yelp yowl