the.com/antagonism
The friction that turns two people, ideas, or muscles into a tug-of-war.
means Active, often hostile opposition between forces, persons, or principles that push against each other.
from From Greek antagonizesthai, to struggle against — anti (against) plus agon (a contest or arena), the same arena that gives us agony.
Muscle pairsBiceps and triceps work as official antagonists.
Story engineNo antagonist, no plot worth telling.
Chemistry tooDrugs that block each other are called antagonists.