The Collaborative International Dictionary of English v.0.48:

Becloud \Be*cloud"\, v. t. [imp. & p. p. Beclouded; p. pr. &
   vb. n. Beclouding.]
   To cause obscurity or dimness to; to dim; to cloud.
   [1913 Webster]

         If thou becloud the sunshine of thine eye. --Quarles.
   [1913 Webster]