ag·i·ta·tor
noun/ˈædʒɪteɪtə(r)/
/ˈædʒɪteɪtər/
(disapproving)- a person who tries to persuade people to take part in political protest
（政治上的）煽动者，鼓动者 - a known agitator and troublemaker
众所周知的煽动者和麻烦制造者
Word Originmid 17th cent. (denoting a delegate of private soldiers in the Parliamentary army during the English Civil War): from Latin, from agitare, frequentative of agere ‘do, drive’. The current sense dates from the mid 18th cent. - a known agitator and troublemaker