Found 2 items, similar to impervious.
English → English (WordNet) Definition: impervious impervious adj : not admitting of passage or capable of being affected; “a material impervious to water”; “someone impervious to argument” [syn: imperviable] [ant: pervious]
English → English (gcide) Definition: Impervious Impervious \Im*per"vi*ous\, a. [L. impervius; pref. im- not + per through + via way. See Voyage.] Not pervious; not admitting of entrance or passage through; as, a substance impervious to water or air. [1913 Webster] This gulf impassable, impervious. --Milton. [1913 Webster] 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. [1913 Webster]