IPA: //ænˈtæɡənɪst//
KK: /æntæɡənɪst/
A person or thing that opposes or fights against someone or something, often seen as the enemy in a story or conflict.
In the movie, the antagonist tried to stop the hero from achieving his goal.
Antagonist → It is formed from "anti-" (meaning against) and "agonist" (from Greek "agonistes", meaning competitor or one who struggles). The word "antagonist" refers to someone who opposes or competes against another, particularly in a conflict or struggle.
Think of someone who is 'against' ('anti-') another person in a struggle or competition — that's what an antagonist does.