adjective (a)

• affording physical or mental rest

  affording fizikal atau mental lain

  Example:
  She spent a restful night at home.
  

  Synonym:
  relaxing, reposeful
  Antonym:
  restless, uneasy
  

  source: wordnet30
• Being at rest; quiet.

  jadi saat istirahat; tenang.

  source: webster1913