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impermeability noun

  /ɪmˌpɜːmi.əˈbɪlɪti/ , /ɪmˌpɝmi.əˈbɪlɪti/
  • the quality of being impermeable
 imperméabilité

impermeable adjective

  /ɪmˈpɜːɹmɪəbəl/
  • Impossible to permeate.
  • Not allowing passage, especially of liquids; waterproof.
 imperméable
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