murmur
1
n babble, buzzing, drone, humming, mumble, muttering, purr, rumble, susurrus (literary) undertone, whisper, whispering
2
vb babble, buzz, drone, hum, mumble, mutter, purr, rumble, speak in an undertone, whisper
3
n beef (slang) complaint, gripe (informal) grouse, grumble, moan (informal) word
4
vb beef (slang) carp, cavil, complain, gripe (informal) grouse, grumble, moan (informal)