adverse

[ad-vurs, ad-vurs] / ædˈvɜrs, ˈæd vɜrs /

ADJECTIVE

unfavorable, antagonistic

Synonyms

STRONGEST

conflicting detrimental disadvantageous inimical injurious negative unfortunate unfriendly

WEAK

allergic to contrary down on down side have no use for inopportune opposed opposing opposite oppugning ornery reluctant repugnant stuffy unlucky unpropitious unwilling

Antonyms

STRONGEST

advantageous assisting beneficial friendly good helpful kind nice

WEAK

aiding auspicious favorable fortunate lucky propitious

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

No moderate or severe adverse events occurred, and only 6.7% of participants experienced mild reactions that resolved on their own.

From Science Daily • Jun. 17, 2026

In April, the Bank of England's most adverse scenario predicted inflation would only go to just above 6% early next year.

From BBC • Jun. 16, 2026

We’re supposed to believe that this is still a legitimate settlement between two adverse parties?

From Slate • Jun. 9, 2026

Studies have also shown adverse effects on the nervous system, reproduction, the hormonal system and the functioning of certain organs including the heart, according to ANSES.

From Barron's • Jun. 2, 2026

Georgie was not averse to inoculation, until he had an adverse reaction to the vaccine. affect/effect.

From "Woe Is I" by Patricia T. O'Conner

Vocabulary lists containing adverse

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