noun (n)

• foolish or senseless behavior

  bodoh atau perilaku yang tak masuk akal

  Synonym:
  craziness, folly, indulgence, lunacy, tomfoolery
  

  source: wordnet30
• The practice of folly; the behavior of a fool; absurdity.

  latihan kebodohan; perilaku bodoh; kemustahilan.

  source: webster1913