IPA: /nɒnˈfluːənsi/
KK: /nɑnˈfluənsi/
A state or condition where someone has difficulty speaking smoothly or easily, often resulting in pauses or repetitions.
His nonfluency in English made it hard for him to express his thoughts clearly.
Nonfluency → It is formed from "non-" (meaning not) and "fluency" (from Latin "fluere", meaning to flow). The word "nonfluency" describes a state of not being able to flow smoothly in speech or writing.
Think of 'not' ('non-') being combined with 'flow' ('fluere') to remember that nonfluency means a lack of smoothness in communication.