Stutterer (noun)

A person who stutters, or speaks with involuntary repetition or prolongation of sounds.

Origin:

From the verb "to stutter" meaning to speak with involuntary repetition or prolongation of sounds.

Examples:

1. He was a stutterer and had difficulty speaking fluently.
2. The speech therapist worked with the stutterer to improve their fluency.
3. He was self-conscious about his stuttering and avoided speaking in public.
4. The stutterer had to make an effort to speak clearly.
5. Some stutterers find it helpful to speak slower and take pauses.