mis·for·tune /ˌmɪsˈfɔrʧən/
  不幸,災禍,壞運氣
  Mis·for·tune n. Bad fortune or luck; calamity; an evil accident; disaster; mishap; mischance.
  Consider why the change was wrought,
  You 'll find his misfortune, not his fault.   --Addison.
  Syn: -- Calamity; mishap; mischance; misadventure; ill; harm; disaster. See Calamity.
  Mis·for·tune, v. i. To happen unluckily or unfortunately; to miscarry; to fail. [Obs.]
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  misfortune
       n 1: unnecessary and unforeseen trouble resulting from an
            unfortunate event [syn: bad luck]
       2: an unfortunate state resulting from unfavorable outcomes
          [syn: bad luck, tough luck, ill luck] [ant: good
          fortune, good fortune]