adj. 25B6; adjective
adverse weather conditions : UNFAVOURABLE, disadvantageous, inauspicious, unpropitious, unfortunate, unlucky, untimely, untoward.
the drug's adverse side effects : HARMFUL, dangerous, injurious, detrimental, hurtful, deleterious.
an adverse response from the public : HOSTILE, UNFAVOURABLE, antagonistic, unfriendly, ill-disposed, negative.
favourable, auspicious, beneficial.