Source : Webster's Revised Unabridged Dictionary (1913)

Muddy \Mud"dy\, v. t. [imp. & p. p. {Muddied}; p. pr. & vb. n.
   {Muddying}.]
   1. To soil with mud; to dirty; to render turbid.

   2. Fig.: To cloud; to make dull or heavy. --Grew.