adjective (a)

• feeling or showing gratitude

  perasaan atau menunjukkan rasa terima kasih

  Example:
  A thankful smile.
  

  Synonym:
  grateful
  Antonym:
  thankless, ungrateful, unthankful
  

  source: wordnet30
• Obtaining or deserving thanks; thankworthy.

  pemberlakuan atau layak terima kasih; thankworthy.

  source: webster1913