murmur
noun
a low continuous indistinct sound; often accompanied by movement of the lips without the production of articulate speech
a schwa that is incidental to the pronunciation of a consonant
Synonymsmurmur vowelan abnormal sound of the heart; sometimes a sign of abnormal function of the heart valves
a complaint uttered in a low and indistinct tone
verb
speak softly or indistinctly
“She murmured softly to the baby in her arms”
make complaining remarks or noises under one's breath
“she grumbles when she feels overworked”
Source: WordNet 3.1, Princeton University
