un·der·mine /-ˈmaɪn/
  (vt.)漸漸破壞,挖掘地基,暗地里破壞
  Un·der·mine v. t.
  1. To excavate the earth beneath, or the part of, especially for the purpose of causing to fall or be overthrown; to form a mine under; to sap; as, to undermine a wall.
     A vast rock undermined from one end to the other, and a highway running through it.   --Addison.
  2. Fig.: To remove the foundation or support of by clandestine means; to ruin in an underhand way; as, to undermine reputation; to undermine the constitution of the state.
     He should be warned who are like to undermine him.   --Locke.
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  undermine
       v 1: destroy property or hinder normal operations; "The
            Resistance sabotaged railroad operations during the war"
            [syn: sabotage, countermine, counteract, subvert,
             weaken]
       2: hollow out as if making a cave or opening; "The river was
          caving the banks" [syn: cave]