07211092-n
(1)
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| brontolio, borbottamento, sussurrio, fiotto, mugugno, borbottio, brontolamento |
| grumbling, murmur, grumble, murmuring, mutter, muttering |
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a complaint uttered in a low and indistinct tone |
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07386920-n
(4)
|
| brontolio, borbottio, bisbiglio |
| murmur, murmuring, muttering, mutter, murmuration, mussitation |
| |
a low continuous indistinct sound; often accompanied by movement of the lips without the production of articulate speech |
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