Definition of impenetrably adverb from the Oxford Advanced Learner's Dictionary



    BrE BrE//ɪmˌpenɪtrəˈbli//
    ; NAmE NAmE//ɪmˌpenɪtrəˈbli//
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  1. 1in a way that is impossible to understand synonym incomprehensibly an impenetrably obscure writer
  2. 2in a way that cannot be entered, passed through or seen through The passage was impenetrably dark.