DictionaryRoot: -istēs
Greek
-istēs
person who acts
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noun
antagonist
an-TAG-uh-nist/ænˈtæɡənɪst/
A person or force that opposes the action of another.
Etymology
An antagonist was someone who competed against another in battle or sport. The role broadened beyond those contests, giving the sense of an opponent who obstructs a central character or goal.