cock·sure /ˈkɑkˈʃʊr/
  (a.)確信的,深信的,獨斷的
  Cock·sure a.
  1. Perfectly safe. [Obs.]
     We steal as in a castle, cocksure: . . . we walk invisible.   --Shak.
  2. Quite certain. [Colloq.]
     I thought myself cocksure of the horse which he readily promised me.   --Pope.
  3. overconfident; -- of people; as, the team was so cocksure of winning that they didn't practice in the week before the big game.. [Colloq.]
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  cocksure
       adj : marked by excessive confidence; "an arrogant and cocksure
             materialist"; "so overconfident and impudent as to
             speak to the queen"; "the less he knows the more
             positive he gets" [syn: overconfident, positive]