antagonistic

From antagonist +‎ -ic.

• IPA^(key): /æn.tæɡ.əˈnɪs.tɪk/

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antagonistic (comparative more antagonistic, superlative most antagonistic)

1. Contending or acting against.

   Synonyms: see Thesaurus:combative

   • 1855, Henry Hart Milman, History of Latin Christianity‎:

     They were distinct, adverse, even antagonistic.

   • 1866, American Journal of Pharmacy and the Sciences Supporting Public Health:

     Though the tephrosia is a powerful agent, and, if carried too far beyond the antagonistic action of the poison, is, I presume, not entirely without danger, I have never known any bad symptoms to arise from its use.

   • 2002, Barry Ames, The Deadlock of Democracy in Brazil, page 171:

     And deputies from opposing parties, inherently more antagonistic than deputies from the same party, can be bought at a lower price.

   • 2023 May 16, Cecilia Kang, “OpenAI’s Sam Altman Urges A.I. Regulation in Senate Hearing”, in The New York Times‎, →ISSN:

     The tone of congressional hearings involving tech industry executives in recent years can best be described as antagonistic.

2. (biochemistry) Relating to an antagonist.

• anti-agnostic, antiagnostic