1. (n.) One hostile to another; one who hates, and desires or attempts the injury of, another; a foe; an adversary; as, an enemy of or to a person; an enemy to truth, or to falsehood.

2. (a.) Hostile; inimical.

adversary adversative adverse aggressive alien antagonist antagonistic anti antipathetic antithetic archenemy assailant attacker battling bellicose belligerent bitter enemy bloodthirsty bloody bloody-minded chauvinist chauvinistic clashing combatant combative competitive competitor con conflicting contender contentious contestant contradictory contrary counter cross devil disaccordant dissentient emulator ferocious fierce fighting foe foeman fractious full of fight hawkish hostile inimical invader jingo jingoish jingoist jingoistic martial militant militaristic military negative noncooperative obstinate offensive open enemy opponent opposed opposing opposing party opposite opposite camp oppositional oppositive oppugnant overthwart perverse public enemy pugnacious quarrelsome recalcitrant refractory repugnant rival saber-rattling sanguinary sanguineous savage scrappy soldierlike soldierly sworn enemy the loyal opposition the opposition the other side trigger-happy truculent uncooperative unfavorable unfriendly unpacific unpeaceable unpeaceful unpropitious warlike warmongering warring