[1] : The Collaborative International Dictionary of English v.0.48

unfriendly \unfriend"ly\, a.
   1. not friendly; not kind or benevolent; hostile; as, an
      unfriendly neighbor.
      1913 webster

   2. not favorable; not adapted to promote or support any
      object; as, weather unfriendly to health.
      1913 webster -- unfriend"liness, n.
      1913 webster
see also:
unfriend"liness 

[2] : WordNet (r) 2.0

unfriendly
     adj 1: not easy to understand or use; "user-unfriendly" ant: friendly
     2: not disposed to friendship or friendliness; "an unfriendly
        coldness of manner"; "an unfriendly action to take" ant:
        friendly
     3: lacking warmth of feeling; "a chilly greeting"; "an
        unfriendly manner" syn: chilly
     4: not friendly; "an unfriendly act of aggression"; "an
        inimical critic" syn: inimical
     5: very unfavorable to life or growth; "a hostile climate"; "an
        uncongenial atmosphere"; "an uncongenial soil"; "the
        unfriendly environment at high altitudes" syn: hostile,
         uncongenial
     also: unfriendliest, unfriendlier
see also:
friendly chilly inimical hostile uncongenial unfriendliest 
unfriendlier 

[3] : Moby Thesaurus II by Grady Ward, 1.0

132 moby thesaurus words for "unfriendly":
   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

Unfriendly >> U Words
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