vain in WordNet English dictionary

1. unproductive of success
   "a fruitless search"; "futile years after her artistic peak"; "a sleeveless errand"; "a vain attempt"
   bootless  fruitless  futile  sleeveless  vain 
   
2. characteristic of false pride; having an exaggerated sense of self-importance
   "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"
   conceited  egotistic  egotistical  self-conceited  swollen  swollen-headed  vain