stutter
verb- [transitive, intransitive]
to have difficulty speaking because you cannot stop yourself from repeating the first sound of some words several times synonym stammer口吃;结结巴巴地说 - [intransitive]
(of a vehicle or an engine )车辆或发动机 to move or start with difficulty, making short sharp noises or movements 突突地吃力行驶(或艰难启动、艰难运转)
Word Originlate 16th cent. (as a verb): frequentative of dialect stut, of Germanic origin; related to German stossen ‘strike against’.