non-,无，非，plus,加。即无以复加的，无言以对的，惊呆的。

1. The speaker was completely nonplussed by the question.

演讲者被这个问题完全难倒了.

来自《简明英汉词典》

2. I was completely nonplussed by his sudden appearance.

他突然出现使我大吃一惊.

来自《简明英汉词典》

3. She expected him to ask for a scotch and was rather nonplussed when he asked her to mix him a martini and lemonade.

她料想他会要一杯苏格兰威士忌，所以当他请她调一杯马提尼酒加柠檬水时，她有点不知所措。

来自柯林斯例句

4. " I'm so glad to see you,'said Carrie, pleased and yet nonplussed.

“ 看见你我太高兴了, "嘉莉说, 既高兴又为难.

来自英汉文学 - 嘉莉妹妹

5. The young fellow was nonplussed.

年轻光头的楞了一会儿,似乎不知怎样好了.

来自汉英文学 - 骆驼祥子