One who antagonizes or stirs.
An opponent or enemy.
A muscle that acts in opposition to another.
A chemical that binds to a receptor but does not produce a physiological response, blocking the action of agonist chemicals.
The main character or force opposing the protagonist in a literary work or drama.
One who objects to ships or shipping deemed offensive, e.g. due to incest, age differences, abusive elements, or power gaps (treating the other partner badly because they have less authority).
One who opposes a specific ship or shipping in general.