adverb (r)

• in a thoughtful manner(adv.all)

  Example:
  He stared thoughtfully out the window.
  

  Antonym:
  thoughtlessly, unthinking, unthinkingly
  

  source: wordnet30
• showing consideration and thoughtfulness(adv.all)

  Example:
  He had thoughtfully brought with him some food to share.
  

  Antonym:
  thoughtlessly
  

  source: wordnet30