The Collaborative International Dictionary of English v.0.48:

Intermingle \In`ter*min"gle\, v. t.
   To mingle or mix together; to intermix. --Hooker.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Intermingle \In`ter*min"gle\, v. i.
   To be mixed or incorporated.
   [1913 Webster]

         Party and faction will intermingle.      --Swift.
   [1913 Webster]

WordNet (r) 3.0 (2006):

intermingle
    v 1: combine into one; "blend the nuts and raisins together";
         "he blends in with the crowd"; "We don't intermingle much"
         [syn: blend, intermix, immingle, intermingle]