agitator
/ˈædʒɪteɪtə(r)/noun
1
- a person who urges others to protest or rebel鼓动者, 煽动者：
a political agitator.
政治煽动者。
2
- an apparatus for stirring liquid, as in a washing machine or a photographic developing tank搅拌装置。
词源
mid 17th cent. (denoting a delegate of private soldiers in the Parliamentary army during the English Civil War)： from Latin， from agitare （see AGITATE）. Sense 1 dates from the mid 18th cent.