stammer

口吃、结巴、说话结结巴巴

He stammers badly whenever he has to speak in public.

他一要在众人面前说话就结巴得很严重。

结结巴巴地说出、支支吾吾地说常与 out 连用

She stammered out an apology and hurried toward the door.

她结结巴巴地道了歉，就匆匆走向门口。

口吃、结巴

Speech therapy helped him overcome his stammer as a child.

语言治疗帮助他在童年时克服了口吃。