impervious
[im-pur-vee-uh s]
- not permitting penetration or passage; impenetrable: The coat is impervious to rain.
- incapable of being injured or impaired: impervious to wear and tear.
- incapable of being influenced, persuaded, or affected: impervious to reason; impervious to another's suffering.
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Also im·per·vi·a·ble [im-pur-vee-uh-buh l] /ɪmˈpɜr vi ə bəl/.
Origin of impervious
Synonyms
See more synonyms for impervious on Thesaurus.com3. invulnerable, closed.
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
impervious
imperviable
- not able to be penetrated, as by water, light, etc; impermeable
- (often postpositive foll by to) not able to be influenced (by) or not receptive (to)impervious to argument
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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
Word Origin and History for imperviousness
impervious
adj.
1640s, from Latin impervius "that cannot be passed through," from assimilated form of in- "not, opposite of" (see in- (1)) + pervius "letting things through," from per "through" + via "road." Related: Imperviously; imperviousness.
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Online Etymology Dictionary, © 2010 Douglas Harper