manqué
adjective /ˈmɒŋkeɪ/
  /mɑːŋˈkeɪ/
 following nouns- used to describe a person who hoped to follow a particular career but who failed in it or never tried it愿望落空的;壮志未酬的;未成功的 - He's really an artist manqué.他很想当艺术家,但未能如愿。 
 
- He's really an artist manqué.