If you are impervious to someone's actions, you are not affected or influenced by them. She seems almost impervious to the criticism from all sides
not admitting of passage or capable of being affected; "a material impervious to water"; "someone impervious to argument
Something that is impervious to water, heat, or a particular object is able to resist it or stop it passing through it. The floorcovering you select will need to be impervious to water. = impermeable
Not pervious; not admitting of entrance or passage through; as, a substance impervious to water or air