- - 1000 express grumble
- - Grumble in secret
- - Grumble quietly
- - [Grumble, grumble, grumble]
- - Grumble
- - Grumble has come from middle of stomach, say
- - Talk indistinctly on the first of March, say
- - Have a quiet word with Mike, say
- - speak quietly, like a mother abroad
- - Speak in a low and indistinct voice
- - Barely audible utterance
- - Speak under one's breath
- - Talk indistinctly
- - Male to speak — inaudibly so?
- - Mumble
- - Murmur complaints
- - Say under one's breath
- - Mouth's opening and nothing more, say, for this?
- - Speak unclearly
- - Voice behind Mike produced whisper of complaint
- - Male, say, to talk under his breath?
- - Murmur indistinctly
- - Speak indistinctly in mass, say
- - Be hard to hear
- - Say inaudibly
- - Express irritation, maybe
- - Speak indistinctly
- - Under-one's-breath sound
- - Not say clearly
- - Complain under one's breath
- - Complain in a murmur
- - Vater's spouse
- - Speak low.
- - Murmur
- - Complain incoherently as male, say
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