adjetivo “vain”
 forma base vain (more/most)
- infrutíferoInscreva-se para ver as traduções de frases de exemplo e as definições monolíngues de cada palavra. 
 They tried in vain to push the broken car up the steep hill. 
- vaidosoShe was so vain that she spent hours looking at herself in the mirror every day. 
- fútil (sem valor verdadeiro ou significância)His promise turned out to be vain when he failed to follow through with any action.