un·do /ˌʌnˈdu, ˈʌn-/
 (v.)撤消(vt.)解開,打開,取消,破壞,毀滅,擾亂(vi.)鬆開


 undo
 取消; 廢除


 Un·do v. t.
 1. To reverse, as what has been done; to annul; to bring to naught.
    What's done can not be undone.   --Shak.
 To-morrow, ere the setting sun,
 She 'd all undo that she had done.   --Swift.
 2. To loose; to open; to take to piece; to unfasten; to untie; hence, to unravel; to solve; as, to undo a knot; to undo a puzzling question; to undo a riddle.
    Pray you, undo this button.   --Shak.
    She took the spindle, and undoing the thread gradually, measured it.   --Sir W. Scott.
 3. To bring to poverty; to impoverish; to ruin, as in reputation, morals, hopes, or the like; as, many are undone by unavoidable losses, but more undo themselves by vices and dissipation, or by indolence.
    That quaffing and drinking will undo you,   --Shak.

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 undo
      v 1: cancel, annul, or reverse an action or its effect; "I wish I
           could undo my actions"
      2: deprive of certain characteristics [syn: unmake] [ant: do]
      3: cause the ruin or downfall of; "A single mistake undid the
         President and he had to resign"
      4: cause to become loose; "undo the shoelace"; "untie the
         knot"; "loosen the necktie" [syn: untie, loosen]
      5: remove the outer cover or wrapping of; "Let's unwrap the
         gifts!"; "undo the parcel" [syn: unwrap] [ant: wrap]
      [also: undone, undid]