Mumble

Part of speech: verb (v.)

1. 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. Peace, you mumbling fool. Shak. A wrinkled hag, with age grown double, Picking dry sticks, and mumbling to herself. Otway.

2. To chew something gently with closed lips.

Part of speech: verb (v.)

1. To utter with a low, inarticulate voice. Bp. Hall.

2. To chew or bite gently, as one without teeth. Gums unarmed, to mumble meat in vain. Dryden.

3. To suppress, or utter imperfectly.