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unknown adjective

  /ʌn(ˈn)əʊn/ , /ʌnˈnoʊn/
  • (sometimes, _, postpositive) Not known; unidentified; not well known.
 unbekannt

unknown noun

  /ʌn(ˈn)əʊn/ , /ʌnˈnoʊn/
  • (algebra) A variable (usually x, y or z) whose value is to be found.
 Unbekannte
  • A person of no identity; a nonentity.
 Unbekannter
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