Enemy

[Sarah]

One hostile to another; one who hates, and desires or attemptsthe injury of, another; a foe; an adversary; as, an enemy of or to aperson; an enemy to truth, or to falsehood.To all good he enemy was still. Spenser.I say unto you, Love your enemies. Matt. v. 44.The enemy (Mil.), the hostile force. In this sense it is construedwith the verb and pronoun either in the singular or the plural, butmore commonly in the singular; as, we have met the enemy and he isours or they are ours.It was difficult in such a country to track the enemy. It wasimpossible to drive him to bay. Macaulay.

[Sarah]

A former friend or acquaintance whose company is no longer considered to be beneficial to a relationship.
One who is deemed or deems him/herself to be of more use to another as an adversary as apposed to an ally.

[Sarah]

Someone you [hate] who [hates] you [back].

[Justin Bieber]

Our one, main, enemy is [Voldemort]. We must [hunt] him down with wild packs of dogs and [Ginny Weasley]. She has some mean attack spells

[Julian]

[Cockney] Slang (Not [rhyming]) for [a mans] wife.

[Lanell]

[sum1] that u [despise] and is the oposer of wot u believe in, often an [ex friend]

[Luis Fok]

The [imaginary] [figures] surrounding an [idiotic] person

[Rihanna]

[the ones] u [supposed to] [luv] but u hate them cuz they better than u

[Magaret]

a girl that you [fix] then you [cant] [get rid of].

[Tanya Shivari]

A person who is actively opposed or hostile to someone or something.