antagonis

Etymology
From, from , from ( + ), from.

Noun

 * 1) antagonist:
 * 2) an opponent or enemy.
 * 3)  a chemical that binds to a receptor but does not produce a physiological response, blocking the action of agonist chemicals.
 * 4)  the main character or force opposing the protagonist in a literary work or drama.
 * 5)  a muscle that acts in opposition to another.
 * 1)  a muscle that acts in opposition to another.
 * 1)  a muscle that acts in opposition to another.