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English definition of “impenetrable”

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impenetrable

adjective uk   /ɪmˈpen.ɪ.trə.bl̩/ us  
impossible to see through or go through: Outside, the fog was thick and impenetrable. an impenetrable barrier impossible to understand: Some of the lyrics on their latest album are completely impenetrable.
impenetrably
adverb uk   /-bli/ us  
(Definition of impenetrable from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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