Adjective
Not pervious; not admitting of entrance or passage through; as, a substance impervious to water or air.
Source: Webster's dictionaryThe czech skull is impervious to reason, but it is scuceptible to blows. Theodor Mommsen
Discipline strengthens the mind so that it becomes impervious to the corroding influence of fear. Bernard Montgomery, 1st Viscount Montgomery of Alamein
It's such a surprise For Eastern eyes To see, That though the English are effete, They're quite impervious to heat. Noël Coward
No man's plenum, Mr. Quistgaard, is impervious to the awl of God's will. Donald Barthelme
It is, of course, further indication that a fundamentalist right has really taken over much of the Republican Party, People might cite George Bush as proof that you can be totally impervious to the effects of Harvard and Yale education. Barney Frank
Cats, as you know, are quite impervious to threats. Connie Willis