adverse

adverse

CEFR: C1-C2 /ad-verse/ [ae0.d.v.er1.s]

Adverse is an adjective describing a factor that seems to work against or actively harm something - like adverse weather conditions or the adverse effects of eating too much sugar.

Example sentences using the word adverse:

Example Sentences:
He had an adverse reaction to the medicine. (meaning he reacted badly to the medicine; the medicine had a bad effect on him)
Many fear that budget cuts will have an adverse (harmful, detrimental) effect on education.
The drug has no adverse side effects.