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1. (adj.) impervious
not permitting penetration or passage:
The pelt is impervious to rain.
2. impervious
incapable of being injured or impaired:
impervious to wear and tear.
3. impervious
incapable of being influenced or affected:
impervious to reason.
Etymology: (1640–50; < L impervius; see im-2, pervious)
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| Definition of 'impervious' |
Princeton's WordNet |
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1. (adj) impervious, imperviable
not admitting of passage or capable of being affected
"a material impervious to water"; "someone impervious to argument"
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| Definition of 'impervious' |
Webster Dictionary |
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1. (adj) impervious
not pervious; not admitting of entrance or passage through; as, a substance impervious to water or air
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Definitions of impervious 
