ineradicable

from WordNet (r) 3.0 (2006)

ineradicable
    adj 1: not able to be destroyed or rooted out; "ineradicable
           superstitions" [ant: {eradicable}]

from The Collaborative International Dictionary of English v.0.48

Ineradicable \In`e*rad"i*ca*ble\, a.
   Incapable of being eradicated or rooted out.
   [1913 Webster]

         The bad seed thus sown was ineradicable. --Ld. Lytton.
   [1913 Webster]

from Moby Thesaurus II by Grady Ward, 1.0

19 Moby Thesaurus words for "ineradicable":
      deathless, immortal, imperishable, impregnable, incorruptible,
      indelible, indestructible, ineffaceable, inexpugnable,
      inextinguishable, invincible, invulnerable, nonperishable,
      quenchless, undampable, undestroyable, undying, unerasable,
      unquenchable

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