stumble, falter, sputter; see stammer.
"stutter." YourDictionary, n.d. Web. 11 October 2018. <http://thesaurus.yourdictionary.com/stutter>.
stutter. (n.d.). Retrieved October 11th, 2018, from http://thesaurus.yourdictionary.com/stutter
To introduce involuntary repetitions and pauses into one's speech:
A speech impediment marked by involuntary repetitions and pauses:
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