impervious

About 1.21 uses per million words.

Meaning

1. adjective Unaffected or unable to be affected by something.

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

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

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

3. adjective Immune to damage or effect.

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

Similar words

imperviable runproof resistant proof soundproof greaseproof mothproof ladder-proof moth-resistant run-resistant

Often followed by

to material layer and surface surfaces stratum clay area

Word family

imperviously imperviousness imperviousnesses