mumble
Pronunciation:
/ˈmʌmbəl/noun
Definitions
A quiet or unintelligible vocalization; a low tone of voice.
Example: All I could hear was a mumble from the next room.
verb
Definitions
To speak unintelligibly or inaudibly; to fail to articulate.
Example: Please try not to mumble so I can hear you better.
To chew something gently with closed lips.