1. 
[syn: dirty, dingy, muddied, muddy]
The Collaborative International Dictionary of English v.0.48:
Muddy \Mud"dy\, v. t. [imp. & p. p. Muddied; p. pr. & vb. n.
   Muddying.]
   1. To soil with mud; to dirty; to render turbid.
      [1913 Webster]
   2. (Fig.): To cloud; to make dull or heavy; to confuse.
      --Grew.
      [1913 Webster]
WordNet (r) 3.0 (2006):
muddied
    adj 1: (of color) discolored by impurities; not bright and
           clear; "dirty" is often used in combination; "a dirty (or
           dingy) white"; "the muddied grey of the sea"; "muddy
           colors"; "dirty-green walls"; "dirty-blonde hair" [syn:
           dirty, dingy, muddied, muddy]