N-UNCOUNT
虚荣(心);自负
If you refer to someone's vanity, you are critical of them because they take great pride in their appearance or abilities.
例句
Men who use steroids are motivated by sheer vanity...
使用类固醇的男人纯粹是受虚荣心的驱使。
With my usual vanity, I thought he might be falling in love with me.
由于我一贯的虚荣心作祟，我以为他可能爱上了我。