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.
Also, imperviable [im-pur-vee-uh-buhl] .


Origin:
1640–50; < Latin impervius. See im-2, pervious

imperviously, adverb
imperviousness, noun

impermeable, impervious.


3. invulnerable, closed.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To imperviousness
Collins
World English Dictionary
impervious or imperviable (ɪmˈpɜːvɪəs)
 
adj (foll by to)
1.  not able to be penetrated, as by water, light, etc; impermeable
2.  not able to be influenced (by) or not receptive (to): impervious to argument
 
imperviable or imperviable
 
adj
 
im'perviously or imperviable
 
adv
 
im'perviousness or imperviable
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
Etymonline
Word Origin & History

impervious
1650, from L. impervius "that cannot be passed through," from in- "not" + pervius "letting things through," from per "through" + via "road."
Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source
Example sentences
If he has read these books his imperviousness to their insights is particularly impressive.
High-density development and imperviousness influence conditions.
Site development proposals are then reviewed in the context of an imperviousness cap.
As land uses within the watershed change from higher to lower densities, impacts from imperviousness decrease.
Related Words
Copyright © 2014 Dictionary.com, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature
FAVORITES
RECENT

;