Resistant, Reverse, Rigorous, Rival, Sinister, Stressful, Sulky, Sullen, Troublesome, Trying, Unappreciative, Uncomplimentary, Uncooperative, Unfriendly, Unhappy, Untoward, Unwilling, Wretched, Adversary, Adverse, Against, Alien, Antagonistic, Anti, Antipathetic, Antithetic, Averse, Balancing, Clashing, Compensating, Competitive, Con, Conflicting, Confronting, Contradictory, Contrary, Contrasted, Contrasting, Converse, Counter, Counterbalancing, Cross, Cursory, Detrimental, Differing, Difficult, Disagreeing, Disappointed, Disapproving, Discontented, Discordant, Discrepant, Disenchanted, Disgruntled, Disillusioned, Disinclined, Disobedient, Displeased, Dissatisfied, Dissenting, Enemy, Forced, Fractious, Hard, Harmful, Hostile, Inconsistent, Indignant, Indisposed, Inimical, Inverse, Involuntary, Low, Miserable, Mutinous, Negative, Obstinate, Obverse, Opponent, Opposing, Opposite, Oppositional, Perfunctory, Perverse, Poor, Recalcitrant, Refractory, Repugnant