Source : Webster's Revised Unabridged Dictionary (1913)

Interchain \In`ter*chain"\, v. t. [imp. & p. p. {Interchained};
   p. pr. & vb. n. {Interchaining}.]
   To link together; to unite closely or firmly, as by a chain.

         Two bosoms interchained with an oath.    --Shak.