Word of the Day: Impervious

im·per·vi·ous

adjective \(ˌ)im-ˈpər-vē-əs\

: not allowing something (such as water or light) to enter or pass through

: not bothered or affected by something

Full Definition of IMPERVIOUS

1a :  not allowing entrance or passage :  impenetrable <a coat impervious to rain>

 b :  not capable of being damaged or harmed <a carpet impervious to rough treatment>
2:  not capable of being affected or disturbed <impervious to criticism>
im·per·vi·ous·ly adverb
im·per·vi·ous·ness noun

Examples:

  1. <the material for this coat is supposed to be impervious to rain>
  2. <the rain forest is impervious to all but the most dedicated explorers>
  3. … Berlin struck me, above all, as impervious to any political reactions whatever … —Stephen Spender, New York Times Magazine, 30 Oct.1977
  4. He looked at her, impervious to her tears … —Jean Stafford, Children Are Bored on Sunday, (1945) 1953
  5. … the trunk … is encased in so hard a bark, as to be almost impervious to a bullet … —Herman Melville, Omoo, 1847

Origin of IMPERVIOUS

Latin impervius, from in- + pervius pervious

First Known Use: 1640

Related to IMPERVIOUS

Synonyms
impenetrable, impermeable, tight
Antonyms
penetrable, permeable, pervious
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