adjective

1. Unaffected or unable to be affected by something.

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

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

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

3. Immune to damage or effect.

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