Impervious Definition

Incapable of being passed through or penetrated.
A fabric impervious to moisture.
Webster's New World
Not affected by.
A garden chair impervious to the elements.
Webster's New World
Able to withstand; not susceptible.
Polar bears impervious to the cold, a poet impervious to criticism.
Webster's New World

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

Although patchworked and sagging, the roof proved impervious to the weather.
The old car seemed to be impervious to the wear and tear of age.

Origin of Impervious

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

    From Wiktionary

  • From Latin impervius in- not in–1 pervius pervious pervious

    From American Heritage Dictionary of the English Language, 5th Edition

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