Unfriendly1. (a.) Not friendly; not kind or benevolent; hostile; as, an unfriendly neighbor.
2. (a.) Not favorable; not adapted to promote or support any object; as, weather unfriendly to health.
Thesaurus Entries
adversary, adversative, adverse, aggressive, alien, allergic, antagonistic, anti, antipathetic, antithetic, autistic, averse, bashful, battling, bellicose, belligerent, bloodthirsty, bloody, bloody-minded, chauvinist, chauvinistic, chill, chilly, clashing, close, closed, cold, combative, competitive, con, conflicting, contentious, contradictory, contrary, cool, counter, cross, disaccordant, disaffected, disenchanted, disinclined, displeased, dissentient, dissociable, enemy, ferocious, fierce, fighting, fractious, frosty, full of fight, hawkish, hostile, icy, ill, incompatible, inhospitable, inimical, insociable, jingo, jingoish, jingoist, jingoistic, martial, militant, militaristic, military, mopey, mopish, morose, negative, noncooperative, nongregarious, not charmed, obstinate, offensive, opponent, opposed, opposing, opposite, oppositional, oppositive, oppugnant, overthwart, perverse, pugnacious, put off, quarrelsome, recalcitrant, refractory, repugnant, rival, saber-rattling, sanguinary, sanguineous, savage, scrappy, self-contained, self-sufficient, snug, socially incompatible, soldierlike, soldierly, strained, sullen, tense, trigger-happy, truculent, unamiable, unamicable, unclubbable, uncommunicative, uncompanionable, uncongenial, uncooperative, uncordial, unfavorable, ungenial, ungracious, unharmonious, unhospitable, unneighborly, unpacific, unpeaceable, unpeaceful, unpropitious, unreceptive, unsociable, unsocial, warlike, warmongering, warring