单词：vainest
a. 自负的( vain的最高级 ); 爱慕虚荣的; 徒劳的; 无用的
s. characteristic of false pride; having an exaggerated sense of self-importance
s. unproductive of success
s. unproductive of success
vain的用法和样例：
例句
用作形容词(adj.)
- She is vain and foolish, and yet people like her.她自负而愚蠢，然而人们喜欢她。
- She is vain of her voice.她自以为她的声音了不起。
- They endeavoured to make her happy but in vain.他们尽量使她快乐，却徒劳无功。
- All his father's exhortations were in vain.他父亲的一切劝告都无效。
- We tried in vain to make him change his mind.我们想使他改变主意，结果是白费心机。
- The world had made him extravagant and vain.世俗使他变得放荡不羁，虚荣自负。
- She is so vain that she can't pass a mirror without looking into it.她好爱虚荣,每经过一面镜子都要照一下。
常见句型
用作形容词(adj.)
用作定语～+ n.- She is one of those vain people who never take others' advice.她属于那种自负得从不听别人劝告的人。
- I don't like a vain woman.我讨厌爱慕虚荣的女人。
- He made a vain attempt to reach the drowning child.他试图接近那个快淹死的小孩,但没有成功。
- All my efforts were vain.我的一切努力都白费了。
- He's very vain of his abilities.他对于自己的能力很自负。
- It is vain to resist.抵抗是没用的。
- Too much praise can make a man vain.过度的赞扬会使人自负。
常用短语
用作形容词(adj.)
in vain- 无效果的,无用的fruitless or uselessIt was in vain that we tried to find his mother.我们百般设法找他的母亲,但毫无结果。
词汇搭配
用作形容词 (adj.)
～+介词- be vain about〔of〕为…而自负
经典引文
All literature, art, and science are vain..if they do not enable you to be glad.
出自：J. RuskinIt is..vain to try to be other than we are.
出自：D. M. FrameThe vain attempts of feminist critics to prove there is a..'women's language'.
出自：New York Review of Books