adjective (a)

• marked by courage and determination in the face of difficulties or danger; robust and uninhibited(adj.all)

  Example:
  You have to admire her; it was a gutsy thing to do.
  The gutsy...intensity of her musical involvement.
  A gutsy red wine.
  

  Synonym:
  plucky
  Antonym:
  gutless
  

  source: wordnet30