thinking too highly of one's appearance, abilities, etc.; conceited
useless or futile
"a conceited fool"
"an attitude of self-conceited arrogance"
"an egotistical disregard of others"
"so swollen by victory that he was unfit for normal duty"
"growing ever more swollen-headed and arbitrary"
"vain about her clothes"
"a fruitless search"
"futile years after her artistic peak"
"a sleeveless errand"
"a vain attempt"
All literature, art, and science are vain..if they do not enable you to be glad.
出自： J. Ruskin
It is..vain to try to be other than we are.
出自： D. M. Frame
The vain attempts of feminist critics to prove there is a..'women's language'.
出自：New York Review of Books