1. mutter - Noun
2. mutter - Verb
To utter words indistinctly or with a low voice and lips partly closed; esp., to utter indistinct complaints or angry expressions; to grumble; to growl.
To sound with a low, rumbling noise.
To utter with imperfect articulations, or with a low voice; as, to mutter threats.
Repressed or obscure utterance.
Source: Webster's dictionaryWhen one is not understood one should as a rule lower one's voice, because when one really speaks loudly enough and is not heard, it is because people do not want to hear. One had better begin to mutter to oneself, then they get curious. Carl Jung
Perhaps 't is pretty to force together Thoughts so all unlike each other; To mutter and mock a broken charm, To dally with wrong that does no harm. Samuel Taylor Coleridge
One trembles to think of that mysterious thing in the soul, which seems to acknowledge no human jurisdiction, but in spite of the individual's own innocent self, will still dream horrid dreams, and mutter unmentionable thoughts. Herman Melville
In my dreams I hear again the crash of guns, the rattle of musketry, the strange, mournful mutter of the battlefield. Douglas MacArthur
District 12. Where you can starve to death in safety," I mutter. Then I glance quickly over my shoulder. Even here, in the middle of nowhere, you worry someone might overhear you. Suzanne Collins
The sanity of the average banquet speaker lasts about two and a half months; at the end of that time he begins to mutter to himself, and calls out in his sleep. James Thurber