Origin: 1250–1300; Middle English enemi < Anglo-French, Old French < Latin inimicus unfriendly, equivalent to in-in-3 + amicus friendly, friend; see amicable
Synonyms 1. antagonist. Enemy,foe refer to a dangerous public or personal adversary. Enemy emphasizes the idea of hostility: to overcome the enemy; a bitter enemy. Foe, a more literary word, may be used interchangeably with enemy, but emphasizes somewhat more the danger to be feared from such a one: deadly foe; arch foe of humankind (the Devil).
early 13c., from O.Fr. enemi, from L. inimicus, from in- "not" + amicus "friend." Most words for "personal enemy" cover also "enemy in war," but certain languages have special terms for the latter, e.g. Gk. polemioi (distinct from ekhthroi), L. hostis, originally "stranger" (distinct from inimicus),
Rus. neprijatel' (distinct from vrag). Rus. vrag (O.C.S. vragu) is cognate with Lith. vargas "misery" (see urge), and probably is related to P.Gmc. *wargoz, source of O.N. vargr "outlaw," hence "wolf;" Icel. vargur "fox," O.E. wearg "criminal, felon;" which likely were the inspirations for J.R.R. Tolkien's warg "a kind of large ferocious wolf" in "The Hobbit" (1937) and "Lord of the Rings." Related: Enemies.