形容词

1. 徒劳的;无效的;不成功的
A vain attempt or action is one that fails to achieve what was intended.

1. unproductive of success

e.g. a fruitless search
futile years after her artistic peak
a sleeveless errand
a vain attempt

Synonym: bootlessfruitlessfutilesleeveless

2. characteristic of false pride
having an exaggerated sense of self-importance

e.g. 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

Synonym: conceitedegotisticegotisticalself-conceitedswollenswollen-headed