The Collaborative International Dictionary of English v.0.48:

Unclose \Unclose\
   See close.

The Collaborative International Dictionary of English v.0.48:

Unclose \Un*close"\, v. t. & i. [1st pref. un- + close.]
   1. To open; to separate the parts of; as, to unclose a
      letter; to unclose one's eyes.
      [1913 Webster]

   2. To disclose; to lay open; to reveal.
      [1913 Webster]