[syn: adverse, contrary]
The Collaborative International Dictionary of English v.0.48:
Adverse \Ad*verse"\, v. t. [L. adversari: cf. OF. averser.]
   To oppose; to resist. [Obs.] --Gower.
   [1913 Webster]
The Collaborative International Dictionary of English v.0.48:
Adverse \Ad"verse\, a. [OE. advers, OF. avers, advers, fr. L.
   adversus, p. p. advertere to turn to. See Advert.]
   [1913 Webster]
   1. Acting against, or in a contrary direction; opposed;
      contrary; opposite; conflicting; as, adverse winds; an
      adverse party; a spirit adverse to distinctions of caste.
      [1913 Webster]
   2. Opposite. "Calpe's adverse height." --Byron.
      [1913 Webster]
   3. In hostile opposition to; unfavorable; unpropitious;
      contrary to one's wishes; unfortunate; calamitous;
      afflictive; hurtful; as, adverse fates, adverse
      circumstances, things adverse.
      [1913 Webster]
            Happy were it for us all if we bore prosperity as
            well and wisely as we endure an adverse fortune.
                                                  --Southey.
      [1913 Webster]
   Adverse possession (Law), a possession of real property
      avowedly contrary to some claim of title in another
      person. --Abbott.
      [1913 Webster]
   Syn: Averse; reluctant; unwilling. See Averse.
        [1913 Webster]
WordNet (r) 3.0 (2006):
adverse
    adj 1: contrary to your interests or welfare; "adverse
           circumstances"; "made a place for themselves under the
           most untoward conditions" [syn: adverse,
           inauspicious, untoward]
    2: in an opposing direction; "adverse currents"; "a contrary
       wind" [syn: adverse, contrary]
Moby Thesaurus II by Grady Ward, 1.0:
88 Moby Thesaurus words for "adverse":
   adversary, adversative, adversive, alien, antagonistic, anti,
   antipathetic, antithetic, antonymous, at cross-purposes, balancing,
   clashing, compensating, competitive, con, conflicting, confronting,
   contradictory, contradistinct, contrapositive, contrarious,
   contrary, contrasted, converse, counter, counteractive,
   counterbalancing, counterpoised, countervailing, cross,
   dead against, deleterious, detrimental, difficult, disaccordant,
   disadvantageous, discordant, discrepant, dissentient, enemy,
   eyeball to eyeball, fractious, hard, harmful, hostile, hurtful,
   impeding, in opposition, inconsistent, inimical, injurious,
   inverse, miserable, negative, noncooperative, not easy, obstinate,
   obstructive, obverse, opponent, opposed, opposing, opposite,
   oppositional, oppositive, oppugnant, overthwart, perverse,
   prejudicial, recalcitrant, refractory, repugnant, reverse,
   rigorous, rival, sinister, squared off, stressful, troublesome,
   troublous, trying, uncooperative, unfavorable, unfriendly,
   unpropitious, unsatisfactory, untoward, wretched