Source : Webster's Revised Unabridged Dictionary (1913)

Bedim \Be*dim"\, v. t. [imp. & p. p. {Bedimmed} (?); p. pr. &
   vb. n. {Bedimming}.]
   To make dim; to obscure or darken. --Shak.

Source : WordNet®

bedim
     v 1: make difficult to perceive by sight; "The foliage of the
          huge tree obscures the view of the lake" [syn: {obscure},
           {benight}]
     2: make obscure or unclear; "The distinction was obscured"
        [syn: {obscure}, {overcloud}]
     [also: {bedimming}, {bedimmed}]

bedimming
     See {bedim}