impenetrable Meaning in the Cambridge English Dictionary
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Meaning of “impenetrable” in the English Dictionary

"impenetrable" in British English

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impenetrableadjective

uk   us   /ɪmˈpen.ɪ.trə.bl̩/
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 ​theirlatestalbum are ​completely impenetrable.
impenetrably
adverb uk   us   /-bli/
(Definition of impenetrable from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"impenetrable" in American English

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impenetrableadjective

 us   /ɪmˈpen·ɪ·trə·bəl/
impossible to ​enter or go through: an impenetrable ​jungle If ​language is ​described as impenetrable, it is ​impossible to ​understand: Too many ​scholarlybooks are written in an impenetrable ​jargon.
(Definition of impenetrable from the Cambridge Academic Content Dictionary © Cambridge University Press)
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