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English definition of “mutter”

mutter

verb [I, T]     /ˈmʌtər/
B2 to speak quietly so that your voice is difficult to hear , often when complaining about something: She walked past me, muttering to herself. He muttered something about the restaurant being too expensive .Ways of speakingWays of talking
mutter noun [C]
(Definition of mutter verb from the Cambridge Learner's Dictionary © Cambridge University Press)

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