impervious

adj

Etymology: From Latin impervius (“that cannot be passed through”), from in- (“not”) + pervius (“letting things through”).

1. Unaffected or unable to be affected by something.

   “The man was completely impervious to the deception we were trying.”

   “Although the Celebrity was almost impervious to sarcasm, he was now beginning to exhibit visible signs of uneasiness, the consciousness dawning upon him that his eccentricity was not receiving the ovation it merited.”

2. Preventive of any penetration; impenetrable, impermeable, particularly of water.

   “Although patchworked and sagging, the roof proved impervious to the weather.”

   “The white faience façade, the glazed Doultonware Carrera marble, was made locally. And being glazed, it was impervious to London's sooty atmosphere, enabling easier cleaning.”

3. Immune to damage or effect.

   “The old car seemed to be impervious to the wear and tear of age.”