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 protects or supports; a defender or advocate.
A guardian or intercessor; synonym of patron saint.
An influential, wealthy person who supported an artist, craftsman, a scholar or a noble.
A customer, as of a certain store or restaurant.
A protector of a dependent, especially a master who had freed a slave but still retained some paternal rights.
One who has gift and disposition of a benefice.
A padrone.