What does antagonize mean?
Antagonize is a verb meaning to cause someone to become hostile, resentful, or actively opposed, typically through words or actions that irritate or offend over time. A manager who dismisses every suggestion may antagonize their staff; a negotiator who issues ultimatums risks antagonizing the other side. The word carries an inherently negative connotation — it implies that the person doing the antagonizing bears some responsibility for provoking the conflict. Beyond interpersonal use, antagonize has an important technical sense in biology and medicine, where it describes one substance or agent opposing or blocking the action of another, as when a drug antagonizes the effect of a second medication. Derived from the Greek agon, meaning contest or struggle, it shares deep roots with antagonist, protagonist, and agony. It remains a precise and useful term for describing how opposition is created, whether between people, groups, or chemical agents.
To make someone hostile or unfriendly by one's actions or words; to provoke resentment or active opposition.
"He antagonized his colleagues by taking credit for their work."
Often used with 'unnecessarily', 'deliberately', or 'risk of' to emphasize that hostility was avoidable.
In biology and medicine, to inhibit or counteract the action of another substance, organ, or agent.
"Caffeine antagonizes the sedative effects of alcohol."
Commonly encountered in pharmacology, e.g., receptor antagonists.
The word comes from Greek 'agon' — the root of 'agony' and 'protagonist' — so to antagonize someone is literally to drag them into a struggle.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of antagonize
Antagonize derives from the Greek word agōn, meaning a contest or struggle, which also gives us antagonist, protagonist, and agony. The Greek adjective antagōnistēs meant an opponent, and this passed into Latin before entering English. The verb antagonize appeared in English usage around the early 17th century, initially meaning to act in opposition to something, with its modern sense of deliberately provoking hostility developing later. Its cognates include antagonist, antagonism, and agonize.
Related word forms
How antagonize is actually used
Standard register in both formal and informal contexts. In British English the spelling 'antagonise' is common. The biological/medical sense (e.g., drug antagonism) is technical but well established. Connotation is negative — describing someone as antagonizing others implies fault on their part.
Easily confused with antagonize
An antagonist is a noun referring to a person or force that opposes another, while antagonize is the verb describing the act of making someone hostile.