Meaning of “impervious” in the English Dictionary

"impervious" in American English

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imperviousadjective

us /ɪmˈpɜr·vi·əs/

not able to be influenced, hurt, or damaged:

He seems to be impervious to pain.
Granite is almost impervious to acid-rain damage.

(Definition of “impervious” from the Cambridge Academic Content Dictionary © Cambridge University Press)