[adjective] [before noun] - going against something, or harmfulThe match has been cancelled due to adverse weather conditions.They received a lot of adverse publicity/criticism about the changes.The advertising company responsible for the campaign say that they are surprised by the adverse public reaction to the poster. [before noun]A lot of local people are worried about the adverse impact that the road building scheme may have on the environment.So far the drug is thought not to have any adverse effects.
Meaning of ADVERSE in English
Cambridge English vocab. Кембриджский английский словарь. 2012