disfluency

[dis-floo-uh n-see]

noun, plural dis·flu·en·cies for 2.

Pathology. impairment of the ability to produce smooth, fluent speech.
an interruption in the smooth flow of speech, as by a pause or the repetition of a word or syllable.

Origin of disfluency

First recorded in 1975–80; dis-¹ + fluency