mutter 2verbdomain: v speakingPrinceton WordNet [ver.3.1]EnglishDefinitionmake complaining remarks or noises under one's breathReport errorPath to highest hypernymMorphologySynset graphExamples1.she grumbles when she feels overworkedSynonymsmurmur 2make complaining remarks or noises under one's breathgrumble 2make complaining remarks or noises under one's breathcroak 3make complaining remarks or noises under one's breathgnarl 2make complaining remarks or noises under one's breath