Pronunciation change

  • IPA (key): /ɪmˈpɛnətrəbəl/ or /ɪmˈpɛnɪtrəbəl/
  • (file)
  • Hyphenation: im‧pen‧e‧tra‧ble

Adjective change

Positive
impenetrable

Comparative
none

Superlative
none

  1. If something is impenetrable, it cannot be penetrated.
  2. (figurative) If something is impenetrable, it cannot be understood.