agitate

transitive verb
1 a obsolete : to give motion to b : to move with an irregular, rapid, or violent action
2 : to excite and often trouble the mind or feelings of : disturb
3 a : to discuss excitedly and earnestly b : to stir up public discussion of
intransitive verb
: to attempt to arouse public feeling

agitator : 선동가, 정치운동가

agitator: one that agitates: as a : one who stirs up public feeling on controversial issues b : a device or an apparatus for stirring or shaking