impervious

[ im-pur-vee-uhs ]

adjective

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.

3. incapable of being influenced, persuaded, or affected:

   impervious to reason; impervious to another's suffering.

   Synonyms: closed, invulnerable

impervious

/ ɪmˈpɜːvɪəs /

adjective

1. not able to be penetrated, as by water, light, etc; impermeable
2. often postpositivefoll byto not able to be influenced (by) or not receptive (to)

   impervious to argument

Derived Forms

• imˈperviousness, noun
• imˈperviously, adverb

Other Words From

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

Word History and Origins

Origin of impervious¹

From the Latin word impervius, dating back to 1640–50. See im- ², pervious

Related Words

• immune
• impassable
• impenetrable
• inaccessible
• invulnerable
• resistant
• unaffected
• unmoved