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English definition of “impervious”

impervious

adjective (PERSON)    /ɪmˈpɜː.vi.əs/ US  /-ˈpɝː-/
describes a person who is not influenced or affected by something: He is impervious to criticism and rational argument.Self-control and moderation
(Definition of impervious adjective (PERSON) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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