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Definition of impenetrable adjective from the Oxford Advanced American Dictionary

     

    impenetrable

     adjective
    adjective
    NAmE//ɪmˈpɛnətrəbl//
     
     
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  1. 1that cannot be entered, passed through, or seen through an impenetrable jungle impenetrable darkness opposite penetrable
  2. 2impossible to understand synonym incomprehensible an impenetrable mystery Her expression was impenetrable. impenetrable to somebody Their jargon is impenetrable to an outsider.
impenetrability
 
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NAmE//ɪmˌpɛnətrəˈbɪlət̮i//
 
noun [uncountable]
impenetrably
 
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NAmE//ɪmˈpɛnətrəbli//
 
adverb an impenetrably obscure writerSee impenetrable in the Oxford Advanced Learner's Dictionary
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