IMPERVIOUS

Pronunciation (US): (GB):

Meaning:

Not admitting of passage or capable of being affected

Example:

someone impervious to argument

Synonyms:

imperviable; impervious

Classified under:

Adjectives

Similar:

fast (resistant to destruction or fading)

acid-fast (not easily decolorized by acid solutions; pertains to micro-organisms (especially the tubercle bacillus that causes tuberculosis))

colorfast (having color that is resistant to fading or running)

greaseproof (resistant to penetration by grease or oil or wax)

moth-resistant; mothproof (resistant to damage by moths)

proof ((used in combination or as a suffix) able to withstand)

resistant (impervious to being affected)

corrosion-resistant (impervious to corrosion)

rot-resistant (resistant to rotting)

ladder-proof; run-resistant; runproof ((of hosiery) resistant to runs or (in Britain) ladders)

soundproof (impervious to, or not penetrable by, sound)

Also:

impermeable (preventing especially liquids to pass or diffuse through)

Antonym:

pervious (admitting of passage or entrance)

Derivation:

imperviousness (the quality of being impenetrable (by people or light or missiles etc.))