English to English

noun (n)

• a disposition free from stress or emotion(noun.attribute)

  Synonym:
  placidity, quiet, repose, serenity, tranquillity
  

  source: wordnet30
• an untroubled state; free from disturbances(noun.state)

  Synonym:
  quiet, tranquillity
  

  source: wordnet30
• a state of peace and quiet(noun.feeling)

  Synonym:
  quietness, quietude, tranquillity
  

  source: wordnet30