noun (n)

• the feeling of despair in the face of obstacles(noun.feeling)

  Synonym:
  disheartenment, dismay
  

  source: wordnet30
• the expression of opposition and disapproval(noun.communication)

  Antonym:
  encouragement
  

  source: wordnet30
• the act of discouraging(noun.act)

  Example:
  The discouragement of petty theft.
  

  source: wordnet30
• The act of discouraging, or the state of being discouraged; depression or weakening of confidence; dejection.(noun)

  source: webster1913