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English definition of “impenetrable”

impenetrable

adjective     /ɪmˈpen.ɪ.trə.bl̩/
impossible to see through or go through: Outside, the fog was thick and impenetrable. an impenetrable barrierTransparentUnavailable and inaccessiblePresent impossible to understand: Some of the lyrics on their latest album are completely impenetrable.Difficult to understandComplicated and difficult to doPuzzle and confuse impenetrably     /-bli/ adverb Difficult to understandComplicated and difficult to doPuzzle and confuse
(Definition of impenetrable adjective from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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