• IPA: /ɪmˈpɛnətɹəbəl/, /ɪmˈpɛntɹəbəl/

impenetrable (not comparable)

  1. Not penetrable.
    The fortress is impenetrable, so it cannot be taken.
    • The avalanche spread and stopped, locking everything it carried into an icy cocoon. It was now a jagged, virtually impenetrable pile of ice, longer than a football field and nearly as wide.
  2. (figuratively) incomprehensible#English|Incomprehensible; fathomless; inscrutable.
    Business jargon makes this document impenetrable, I can't understand it.
  3. opaque#English|Opaque; obscure; not translucent or transparent.
    When night falls, she cloaks the world in impenetrable darkness.
Synonyms Antonyms Translations
  • French: impénétrable
  • German: undurchlässig
  • Russian: (impermeable) непроница́емый
  • Spanish: impenetrable

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