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2 definitions found

From: Webster's Revised Unabridged Dictionary (1913)

 Im·per·vi·a·ble a. Not pervious; impervious. [R.] -- Im*per*vi*a*ble*ness, n. [R.]
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From: WordNet (r) 2.0

 imperviable
      adj : not admitting of passage or capable of being affected; "a
            material impervious to water"; "someone impervious to
            argument" [syn: impervious] [ant: pervious]