noun (n)

• steadiness of mind under stress

  steadiness pikiran di bawah tekanan

  Example:
  He accepted their problems with composure and she with equanimity.
  

  Synonym:
  calm, calmness, composure
  Antonym:
  discomposure
  

  source: wordnet30
• Evenness of mind; that calm temper or firmness of mind which is not easily elated or depressed; patience; calmness; composure; as, to bear misfortunes with equanimity.

  kegenapan pikiran; itu tenangkan emosi atau kekukuhan pikiran yang tidak mudah riang dan tertekan; kesabaran; keredaan; ketenangan; sebagai, untuk menanggung misfortunes ketenangan hati dengan saya/ aku.

  source: webster1913