un·sight /-ˈsaɪt/
  (a.)不檢查的,未見過的
  Un·sight a. Doing or done without sight; not seeing or examining. [Colloq.]
  Unsight unseen, a colloquial phrase, denoting unseeing unseen, or unseen repeated; as, to buy a thing unsight unseen, that is, without seeing it.
  For to subscribe, unsight, unseen,
  To a new church discipline.   --Hudibras.
     There was a great confluence of chapmen, that resorted from every part, with a design to purchase, which they were to do =\“unsight unseen.”\=   --Spectator.
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