GNU Dico

Found one definition

1.                 From GNU Collaborative International Dictionary of English, version 0.54:
                   
   
   
                   
                     
   Ywar (?), a. [See {Aware}.] Aware; wary. [Obs.] “Be ywar, and his way shun.”
               Piers Plowman.
   
   [1913 Webster]