im·per·me·able /(ˌ)ɪmˈpɚ/
  (a.)不能滲透的,不滲透性的
  im·per·me·able /(ˈ)ɪmˈpɝmɪəbəl/ 形容詞
  不(滲)透的,不(可)通透的
  Im·per·me·a·ble a.  Not permeable; not permitting passage, as of a fluid. through its substance; impervious; impenetrable; as, India rubber is impermeable to water and to air. -- Im*per*me*a*ble*ness, n. -- Im*per*me*a*bly, adv.
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  impermeable
       adj : preventing especially liquids to pass or diffuse through;
             "impermeable stone"; "an impermeable layer of scum"; "a
             coat impermeable to rain" [ant: permeable]