- 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. - To chew something gently with closed lips.
2 . Mumble
[ v. t.]
- To utter with a low, inarticulate voice. - To chew or bite gently, as one without teeth. - To suppress, or utter imperfectly.
Meaning of 'mumble' (Princeton's WordNet)
1 . mumble
[ v]
Meaning (1): - grind with the gums; chew without teeth and with great difficulty
Example in sentence:
the old man had no teeth left and mumbled his food