mutters

Noun

• 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
• plural of mutter

Verb

• talk indistinctly; usually in a low voice
• make complaining remarks or noises under one's breath
• third-person singular simple present indicative of mutter

Synonyms

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