agitator

UK: /ˈædʒɪteɪtə^r/ US: (aj′i tā′tər)

WordReference Random House Unabridged Dictionary of American English © 2025

ag•i•ta•tor  (aj′i tā′tər), n. 

1. a person who stirs up others in order to upset the status quo and further a political, social, or other cause:
   The boss said he would fire any union agitators.
2. Mechanical Engineering a machine or device for agitating and mixing.

• 1730–40; agitate + -or²

ag•i•ta•to•ri•al  (aj′i tə tôr′ē əl, -tōr′-), adj. 

Collins Concise English Dictionary © HarperCollins Publishers::

agitator / ˈædʒɪˌteɪtə/ noun

1. a person who agitates for or against a cause, etc
2. a device, machine, or part used for mixing, shaking, or vibrating a material, usually a fluid