impervious

Meanings

1. 1
   adj

   not admitting of passage or capable of being affected

   a material impervious to water

2. 2
   adj

   Unaffected or unable to be affected by something.

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

3. 3
   adj

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

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

4. 4
   adj

   Immune to damage or effect.

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

Etymology

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