stammer

He tends to stammer when he's nervous.

Her stammer becomes more pronounced when she's excited.

The child's stammer improved with speech therapy.

Some people stammer due to anxiety or stress.

He tried to hide his stammer during the presentation.

The stammer in his speech made it difficult to understand him.

She felt self-conscious about her stammer in social situations.

The stammering student was encouraged to seek help from a speech therapist.

His stammer disappeared when he recited poetry.

The actor's stammer added authenticity to his character.