noun (n)

• something that baffles understanding and cannot be explained

  sesuatu yang baffles pemahaman dan tidak boleh dijelaskan

  Synonym:
  closed book, mystery, secret
  

  source: wordnet30
• a difficult problem

  masalah yang sulit

  Synonym:
  brain-teaser, conundrum, riddle
  

  source: wordnet30
• A dark, obscure, or inexplicable saying; a riddle; a statement, the hidden meaning of which is to be discovered or guessed.

  yang gelap, samar, atau mengatakan yang tak bisa dijelaskan; teka teki; pernyataan, yang tersembunyi makna yang ditemukan atau menebak.

  source: webster1913