c.1225, 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."