Inleaguing

from The Collaborative International Dictionary of English v.0.48

Inleague \In*league"\, v. t. [imp. & p. p. {Inleagued}; p. pr. &
   vb. n. {Inleaguing}.]
   To ally, or form an alliance with; to unite; to combine.
   [1913 Webster]

         With a willingness inleague our blood
         With his, for purchase of full growth in friendship.
                                                  --Ford.
   [1913 Webster]