in·erad·i·ca·ble /ˌɪnɪˈrædɪkəbəl/
  (a.)不能根除的,根深蒂固的
  In·e·rad·i·ca·ble a. Incapable of being eradicated or rooted out.
     The bad seed thus sown was ineradicable.   --Ld. Lytton.
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  ineradicable
       adj : not able to be destroyed or rooted out; "ineradicable
             superstitions" [ant: eradicable]