The Collaborative International Dictionary of English v.0.48:

Obscure \Ob*scure"\, v. t. [imp. & p. p. Obscured
   ([o^]b*sk[=u]rd"); p. pr. & vb. n. Obscuring.] [L.
   obscurare, fr. obscurus: cf. OF. obscurer. See Obscure, a.]
   To render obscure; to darken; to make dim; to keep in the
   dark; to hide; to make less visible, intelligible, legible,
   glorious, beautiful, or illustrious.
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         They are all couched in a pit hard by Herne's oak, with
         obscured lights.                         --Shak.
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         Why, 't is an office of discovery, love,
         And I should be obscured.                --Shak.
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         There is scarce any duty which has been so obscured by
         the writings of learned men as this.     --Wake.
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         And seest not sin obscures thy godlike frame? --Dryden.
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