stammer
verb
noun
ˈstæmə verb
1 to speak with a lot of pauses and repeated sounds, either because you have a speech problem, or because you are nervous, excited etc 口吃,结结巴巴地说;
Whenever he was angry he would begin to stammer slightly.
他一生气说话就开始有点结巴。
Ben stammered out an apology.
本结结巴巴地道了个歉。
noun
2 a speech problem which makes someone speak with a lot of pauses and repeated sounds 结巴,口吃;
Jeff spoke with a slight stammer.
杰夫说话有点结巴。