foe foe /ˈfoʊ/

noun

1. () (military) an armed adversary (especially a member of an opposing military force)  ( foeman [Archaic] , opposition , enemy , foe )
   (military) an armed adversary (especially a member of an opposing military force)
    A soldier must be prepared to kill his enemies
   a soldier must be prepared to kill his enemies
   
2. () A personal enemy  ( enemy , foe )
   a personal enemy
    They had been political foes for years
   they had been political foes for years