Other crossword clues for answer "MUTTER"MUTTERBe hard to hearComplain in a murmurComplain under one's breathGrumbleUnder-one's-breath soundSpeak under one's breathSpeak indistinctlyMurmur indistinctlyGrumble quietlySpeak unclearlyMurmur complaintsSpeak low.Not say clearly[Grumble, grumble, grumble]Say inaudiblyGrouse quietlyGripe under one's breathVater's<P> spouseExpress irritation, maybe