[ im-pur-vee-uhs ]
See synonyms for: imperviousimperviousness on

  1. not permitting penetration or passage; impenetrable: The coat is impervious to rain.

  2. incapable of being injured or impaired: impervious to wear and tear.

  1. incapable of being influenced, persuaded, or affected: impervious to reason; impervious to another's suffering.

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Origin of impervious

From the Latin word impervius, dating back to 1640–50. See im-2, pervious
  • Also im·per·vi·a·ble [im-pur-vee-uh-buhl]. /ɪmˈpɜr vi ə bəl/.

Other words for impervious

Other words from impervious

  • im·per·vi·ous·ly, adverb
  • im·per·vi·ous·ness, noun

Words that may be confused with impervious

Words Nearby impervious Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use impervious in a sentence

British Dictionary definitions for impervious



/ (ɪmˈpɜːvɪəs) /

  1. not able to be penetrated, as by water, light, etc; impermeable

  2. (often postpositive foll by to) not able to be influenced (by) or not receptive (to): impervious to argument

Derived forms of impervious

  • imperviously, adverb
  • imperviousness, noun

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012