Stammer

Webster's Dictionary of the English Language

·noun Defective utterance, or involuntary interruption of utterance; a stutter.

II. Stammer ·vt To utter or pronounce with hesitation or imperfectly;

— sometimes with out.

III. Stammer ·vi To make involuntary stops in uttering syllables or words; to hesitate or falter in speaking; to speak with stops and diffivulty; to Stutter.