dumb

哑的，无说话能力的；不说话的，无声音的英释adjadjunable to speak, because you are angry, surprised, shocked etc

1 deaf and dumb,聋哑的，又聋又哑

2 dumb waiter,n. 小型送货升降机；送菜升降机，餐用升降机

1 He stared at the burnt-out car in dumb disbelief..他难以置信地望着烧毁的汽车，话也说不出来了。

2 She was struck dumb with terror..她吓得说不出话来。