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improper adjective

  /ɪmˈpɹɑ.pɚ/ , /ɪmˈpɹɒp.ə/ , /ɪmˈpɹɔp.ə/
  • Unsuitable to needs or circumstances; inappropriate; inapt.
 inadapté, inapproprié, impropre
  • Not in keeping with conventional mores or good manners; indecent or immodest.
 grossier, impropre, inconvenant
  • Not properly named; See, for example, improper fraction.
 impropre

improperness noun

impropriété
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