Foe /(fō)/

Foe

n.
  1. One who entertains personal enmity, hatred, grudge, or malice, against another; an enemy.
    A man's foes shall be they of his own household.
    — Matt. x. 36
  2. An enemy in war; a hostile army.
  3. One who opposes on principle; an opponent; an adversary; an ill-wisher; as, a foe to religion.
    A foe to received doctrines.

Foe

v. t.
  1. To treat as an enemy. [Obs.]