im·per·vi·ous /(ˌ)ɪmˈpɚ/
  (a.)透不過的,不滲透的,無動於衷的,不受影響的
  im·per·vi·ous /(ˈ)ɪmˈpɝvɪəs/ 形容詞
  Im·per·vi·ous a.  Not pervious; not admitting of entrance or passage through; as, a substance impervious to water or air.
     This gulf impassable, impervious.   --Milton.
     The minds of these zealots were absolutely impervious.   --Macaulay.
  Syn: -- Impassable; pathless; impenetrable; imperviable; impermeable.
  -- Im*per*vi*ous*ly, adv. -- Im*per*vi*ous*ness, n.
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  impervious
       adj : not admitting of passage or capable of being affected; "a
             material impervious to water"; "someone impervious to
             argument" [syn: imperviable] [ant: pervious]