noun (n)

• a feeling of understanding(noun.feeling)

  Synonym:
  insight, perceptivity
  

  source: wordnet30
• delicate discrimination (especially of aesthetic values)(noun.cognition)

  Synonym:
  appreciation, discernment, taste
  

  source: wordnet30
• perception of that which is obscure(noun.cognition)

  Synonym:
  discernment
  

  source: wordnet30
• the quality of insight and sympathetic understanding(noun.attribute)

  Antonym:
  unperceptiveness
  

  source: wordnet30