adverb (r)

• without good sense or judgment

  tanpa akal sehat atau penghakiman

  Example:
  He acted foolishly when he agreed to come.
  

  Synonym:
  unwisely
  Antonym:
  sagely, wisely
  

  source: wordnet30
• In a foolish manner.

  dalam cara yang bodoh.

  source: webster1913