intransitive verb. To speak indistinctly in low tones.

intransitive verb. To complain or grumble morosely.

intransitive verb. To utter or say in low indistinct tones.

noun. A low grumble or indistinct utterance.

To utter words in a low tone and with compressed lips, as in complaint or sullenness; murmur; grumble.

To emit a low rumbling sound.

To utter with imperfect articulation, or in a low murmuring tone.

noun. A murmur or murmuring; sullen or veiled utterance.

transitive verb. To utter with imperfect articulations, or with a low voice.

noun. Repressed or obscure utterance.

intransitive verb. To utter words indistinctly or with a low voice and lips partly closed; esp., to utter indistinct complaints or angry expressions; to grumble; to growl.

intransitive verb. To sound with a low, rumbling noise.

noun. A repressed or obscure utterance; an instance of muttering.

noun. peas

verb. To utter words, especially complaints or angry expressions, indistinctly or with a low voice and lips partly closed; to say under one's breath.

verb. To speak softly and incoherently, or with imperfect articulations.

verb. To make a sound with a low, rumbling noise.

verb. talk indistinctly; usually in a low voice

noun. a low continuous indistinct sound; often accompanied by movement of the lips without the production of articulate speech

noun. a complaint uttered in a low and indistinct tone

verb. make complaining remarks or noises under one's breath

"How can I parse this strange Arcadian Death, in mutter of oath, in rhyme of breath?"

mutter paneer  muttered  muttering  

complain  complaint  kick  kvetch  mouth  

Nutter  Sutter  aflutter  butter  clutter  

glower  grimace  growl  grunt  insufflation  

air a grievance  aspirate  aspiration  bark  bated breath  

muttered  muttering  mutters