adjective (a)

• showing absence of intellectual inquisitiveness or natural curiosity(adj.all)

  Example:
  Strangely incurious about the cause of the political upheaval surrounding them.
  

  Antonym:
  curious
  

  source: wordnet30
• Not curious or inquisitive; without care for or interest in; inattentive; careless; negligent; heedless.(adjective)

  source: webster1913