Definition of adverse in English:

adverse

adjective

  • Preventing success or development; harmful; unfavorable.

    ‘taxes are having an adverse effect on production’
    ‘adverse weather conditions’
    • ‘Perhaps they never learned how to drive in adverse conditions in the first place.’
    • ‘The trials had been cancelled after the drug was found to cause an adverse reaction.’
    • ‘So when lawn edges become overgrown and tatty, it can have an adverse effect on the look of the whole garden.’
    • ‘A hike in interest rates could have an adverse effect on house prices and in terms of consumer wealth.’
    • ‘It was bound to attract adverse publicity and bring the profession into disrepute.’
    • ‘I hope his commitment and long hours do not have adverse effects on him or his family.’
    • ‘The adverse publicity has caused tourists to stay away in droves from the countryside and towns.’
    • ‘Fortunately, most schools forced to close due to the adverse weather were due to reopen today.’
    • ‘Sources say that clients are leaving in droves because of the continuing adverse publicity.’
    • ‘The child required urgent medical attention but did not develop long term adverse effects.’
    • ‘The development will not have any adverse effect upon bats or other wildlife living in the area.’
    • ‘Not only did they put up a good show in adverse circumstances, they entertained the crowd greatly.’
    • ‘Of course, there is also the adverse publicity that could dog them for years to come.’
    • ‘She said the development would have major adverse impacts on the beauty of the landscape.’
    • ‘He believed it would have adverse effect on business and trade in the community.’
    • ‘Roadworks on three of the routes in and out of Skipton are having an adverse effect on local businesses.’
    • ‘Despite the adverse blustery weather conditions, it was clear that Oxford had the edge.’
    • ‘The most common adverse effects reported related to skin irritation and skin burning.’
    • ‘Bacteria present in organic matter can have adverse effects on human and animal health.’
    • ‘The adverse publicity generated by the hijacking was the last thing the airline needed.’
    unfavourable, disadvantageous, inauspicious, unpropitious, unfortunate, unlucky, untimely, untoward
    harmful, dangerous, injurious, detrimental, hurtful, deleterious, destructive, pernicious, disadvantageous, unfavourable, unfortunate, unhealthy
    hostile, unfavourable, antagonistic, unfriendly, ill-disposed, negative, opposing, opposed, contrary, dissenting, inimical, antipathetic, at odds
    View synonyms

Usage

Adverse means ‘hostile, unfavorable, opposed,’ and is usually applied to situations, conditions, or events—not to people: the dry weather has had an adverse effect on the garden. Averse is related in origin and also has the sense of ‘opposed,’ but is usually employed to describe a person's attitude: I would not be averse to making the repairs myself. See also averse

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.

Pronunciation