The Collaborative International Dictionary of English v.0.48:

Intermix \In`ter*mix"\, v. t.
   To mix together; to intermingle.
   [1913 Webster]

         In yonder spring of roses, intermixed
         With myrtle, find what to redress till noon. --Milton.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Intermix \In`ter*mix"\, v. i.
   To be mixed together; to be intermingled.
   [1913 Webster]

WordNet (r) 3.0 (2006):

intermix
    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]

Moby Thesaurus II by Grady Ward, 1.0:

41 Moby Thesaurus words for "intermix":
   admix, alloy, amalgamate, bemingle, blend, coalesce, combine,
   commingle, commix, compose, compound, concoct, conglomerate,
   emulsify, fuse, hash, homogenize, immingle, immix, integrate,
   interblend, interfuse, interlace, interlard, intermingle,
   intertwine, interweave, jumble, knead, merge, mingle,
   mingle-mangle, mix, mix up, scramble, shuffle, stir up, syncretize,
   throw together, toss together, work