Agitator
/ˈædʒəˌteɪtər/
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Definition
(noun) One who agitates; one who stirs up or excites others, for example political reformers.
Sentence Examples
The students were animated by the agitator's appeal.
The agitator is inclined to exaggerate trivial matters.
CEFR Practice Quiz
The old washing machine has a central ____ that moves the clothes through the water.