1. 口吃;结巴
If someone has a stutter, they find it difficult to say the first sound of a word, and so they often hesitate or repeat it two or three times.

2. 口吃;说话结结巴巴
If someone stutters, they have difficulty speaking because they find it hard to say the first sound of a word.

1. a speech disorder involving hesitations and involuntary repetitions of certain sounds

Synonym: stammer