adverse synonyms:
adj
1 antagonistic, attacking, censorious, critical, derogatory, disapproving, hostile, hurtful, inimical, negative, uncomplimentary, unfavourable, unfriendly, unkind, unsympathetic.
2 adverse conditions. contrary, deleterious, detrimental, dis advantageous, harmful, inappropriate, inauspicious, opposing, prejudicial, uncongenial, unfortunate, unpropitious.
Opp FAVOURABLE.