interjoin

from The Collaborative International Dictionary of English v.0.48

Interjoin \In`ter*join"\, v. t. [imp. & p. p. {Interjoined}; p.
   pr. & vb. n. {Interjoining}.] [Pref. inter + join.]
   To join mutually; to unite. [R.] --Shak.
   [1913 Webster]