I. noun
1.
a low indistinct but often continuous sound (as of voices)
could hear the murmur of the audience throughout the entire performance
Synonyms: mumble, mutter, rumor, susurration, undertone, whisper
Related Word: murmuration; buzz, drone, hum, purr; brool
2.
Synonyms: report 1, buzz, cry, gossip, grapevine, hearsay, rumble, rumor, scuttlebutt, talk
II. verb
1.
Synonyms: grumble 1, croak, grouch, grouse, ||grunt, mutter, scold
2.
Synonyms: complain , fuss, kick, repine, wail, whine
3.
Synonyms: mumble , ||chunter, fumble, muddle, ||mump, mutter, swallow