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3 definitions found

From: DICT.TW English-Chinese Dictionary 英漢字典

 imperviousness
 透不過

From: Webster's Revised Unabridged Dictionary (1913)

 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.
 ◄ ►

From: WordNet (r) 2.0

 imperviousness
      n : resistance to penetration by a liquid [syn: impenetrability]
          [ant: penetrability, penetrability]