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.
They are all couched in a pit hard by Herne's oak, with
obscured lights. --Shak.
Why, 't is an office of discovery, love,
And I should be obscured. --Shak.
There is scarce any duty which has been so obscured by
the writings of learned men as this. --Wake.
And seest not sin obscures thy godlike frame? --Dryden.