'Imperviable' definitions:

Definition of 'imperviable'

From: WordNet
adjective
Not admitting of passage or capable of being affected; "a material impervious to water"; "someone impervious to argument" [syn: impervious, imperviable] [ant: pervious]

Definition of 'Imperviable'

From: GCIDE
  • Imperviable \Im*per"vi*a*ble\, a. Not pervious; impervious. [R.] -- {Im*per"vi*a*ble*ness}, n. [R.] [1913 Webster]