- 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.
- not able to be penetrated, as by water, light, etc; impermeable
- not able to be influenced (by) or not receptive (to)
