Adverse interest refers to a conflict of interest where a person has a stake that is in opposition to the interests of another party involved in the same matter. Synonyms for adverse interest include conflicting interest, opposing interest, contrary interest, divergent interest, unaligned interest, or competing interest. Other related terms that convey similar meanings include antithetical, contradictory, hostile, unfavorable, and negative interests. In legal cases, adverse parties refer to individuals or entities whose interests are antithetical or conflicting to those of the plaintiff. It is essential to identify and minimize conflicts of interest to maintain transparency, fairness, and impartiality in decision-making processes.