agitator
Definitions
A person who urges others to protest or rebel.
A device used for stirring or shaking a liquid or other substance.
Examples
The political agitator was arrested for inciting a riot during the peaceful protest.
The washing machine stopped working because the central agitator became jammed with clothing.
Synonyms
troublemaker instigator provocateur firebrand inciter rabble-rouser subversive
Antonyms
peacemaker pacifier mediator stabilizer conciliator appeaser harmonizer