One who entertains personal enmity, hatred, grudge, or malice, against another; an enemy.
An enemy in war; a hostile army.
One who opposes on principle; an opponent; an adversary; an ill-wisher; as, a foe to religion.
To treat as an enemy.
an armed adversary (especially a member of an opposing military force); "a soldier must be prepared to kill his enemies"
a personal enemy; "they had been political foes for years"
An opponent; the antithesis of friend.
Friends of the Earth