The Collaborative International Dictionary of English v.0.48:

Warray \War"ray\, v. t. [OF. werreier, werrier, guerroier, F.
   guerroyer, from OF. werre war, F. guerre; of German origin.
   See War.]
   To make war upon. [Obs.] Fairfax. "When a man warrayeth
   truth." --Chaucer.
   [1913 Webster]