muttering

Noun	1.	muttering - a low continuous indistinct sound; often accompanied by movement of the lips without the production of articulate speech Synonyms: murmur, murmuration, murmuring, mussitation, mutter
	2.	muttering - a complaint uttered in a low and indistinct tone Synonyms: grumble, grumbling, murmuring, mutter, murmur
Adj.	1.	muttering - speaking low and indistinctly; "a mumbling parson stood beside the dying man"; "muttering crowds of onlookers" Synonyms: mumbling

mumbling, speaking