Meaning of ADVERSE in English

ADVERSE

/ ˈædvɜːs; ədˈvɜːs; NAmE -vɜːrs/ adjective

[ usually before noun ] negative and unpleasant; not likely to produce a good result :

adverse change / circumstances / weather conditions

Lack of money will have an adverse effect on our research programme.

They have attracted strong adverse criticism.

This drug is known to have adverse side effects.

►  ad·verse·ly adverb :

Her health was adversely affected by the climate.

••

WORD ORIGIN

late Middle English : from Old French advers , from Latin adversus against, opposite, past participle of advertere , from ad- to + vertere to turn. Compare with averse .

Oxford Advanced Learner's English Dictionary.      Оксфордский английский словарь для изучающик язык на продвинутом уровне.