opponent
adj : characterized by active hostility; "opponent (or opposing)
armies" [syn: {opposing}]
n 1: a contestant that you are matched against [syn: {opposition},
{opposite}]
2: an armed adversary (especially a member of an opposing
military force); "a soldier must be prepared to kill his
enemies" [syn: {enemy}, {foe}, {foeman}, {opposition}]
3: someone who offers opposition [syn: {adversary}, {antagonist}]