(1):
(v. t.) To utter with a low, inarticulate voice.
(2):
(v. t.) To suppress, or utter imperfectly.
(3):
(v.) To chew something gently with closed lips.
(4):
(v. t.) To chew or bite gently, as one without teeth.
(5):
(v.) To speak with the lips partly closed, so as to render the sounds inarticulate and imperfect; to utter words in a grumbling indistinct manner, indicating discontent or displeasure; to mutter.