Source : Webster's Revised Unabridged Dictionary (1913)

Injoint \In*joint\, v. t. [Pref. in- in + joint.]
   To join; to unite. [R.] --Shak.

Injoint \In*joint\, v. t. [Pref. in- in + joint.]
   To disjoint; to separate. [Obs.] --Holland.