impervious

An impervious surface is one that can't be penetrated. The word is often followed by "to," as in "His steely personality made him impervious to jokes about his awful haircut."

Most of the sentences you'll run across using impervious will be followed by the word "to" and a noun. Things are often described as being impervious to physical assaults like heat, water, bullets, weather, and attack, but just as frequently to less tangible things, like reason, criticism, pain, and pressure. The word comes from Latin: in- + pervius, meaning "not letting things through." A common synonym is impermeable.

Definitions of impervious
  1. adjective
    not admitting of passage or capable of being affected
    “a material impervious to water”
    “someone impervious to argument”
    synonyms: imperviable
    impermeable
    preventing especially liquids to pass or diffuse through
    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
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    Antonyms:
    pervious
    admitting of passage or entrance
    permeable
    allowing fluids or gases to pass or diffuse through
    receptive
    open to arguments, ideas, or change
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