unknown

1. (postpositional, sometimes)Not known; unidentified; not well known.

   The concept has existed since times unknown.

   unbekannt

   неизве́стныйneizvéstnyj, незнако́мыйneznakómyj, неве́домыйnevédomyj

   невідо́мийnevidómyj, незна́нийneznányj, незнайо́мийneznajómyj

   not known

1. The cause of the fire was unknown.

   Причина пожежі була невідома. — aandrusiak

   ruПричина пожара была неизвестной. — FeuDRenais

   deDie Ursache des Brandes war unbekannt. — al_ex_an_der

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2. The cause of the fire is unknown.

   Причина пожежі невідома. — deniko

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3. The exact cause is unknown.

   Точна причина невідома. — deniko

   ruТочная причина неизвестна. — marafon

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4. The meaning is unknown to me.

   deDiese Bedeutung ist mir unbekannt. — riotlake

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5. Where Tom did that is unknown.

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regular