/im-pur-vee-uhs/

adjective

 

1. Not permitting penetration or passage; impenetrable:

The coat is impervious to rain.

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2. Incapable of being injured or impaired:

impervious to wear and tear.

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

impervious to reason; impervious to another's suffering.

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