—v.
1 intr. stammer, esp. by involuntarily repeating the first consonants of words.
2 tr. (often foll. by out) utter (words) in this way.
—n.
1 the act or habit of stuttering.
2 an instance of stuttering.
Derivatives:
stutterer n. stutteringly adv.
Etymology: frequent. of ME (now dial.) stut f. Gmc
Useful english dictionary. 2012.