mutter

Meanings

• a low continuous indistinct sound; often accompanied by movement of the lips without the production of articulate speech
• a complaint uttered in a low and indistinct tone
• talk indistinctly; usually in a low voice
• make complaining remarks or noises under one's breath

Synonyms

croak, gnarl, grumble, grumbling, maunder, mumble, murmur, murmuration, murmuring, mussitate, mussitation, muttering