(1):

(v. i.) To make involuntary stops in uttering syllables or words; to hesitate or falter in speaking; to speak with stops and diffivulty; to stutter.

(2):

(v. t.) To utter or pronounce with hesitation or imperfectly; - sometimes with out.

(3):

(n.) Defective utterance, or involuntary interruption of utterance; a stutter.