un·say /-ˈse, ||ˈsɛ/
 (vt.)取消,撤回


 Un·say v. t.  To recant or recall, as what has been said; to refract; to take back again; to make as if not said.
    You can say and unsay things at pleasure.   --Goldsmith.

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 unsay
      v : take back what one has said; "He swallowed his words" [syn:
          swallow, take back, withdraw]
      [also: unsaid]