An agitator is a device or mechanism used to stir or mix substances, often found in various industrial and household applications. In washing machines, for example, the agitator helps to move clothes through water and detergent, ensuring effective cleaning. It typically consists of a central post with fins or blades that create movement in the wash drum. In a broader context, the term "agitator" can also refer to a person who stirs up public interest or action regarding social or political issues. These individuals often advocate for change and can be found in movements related to civil rights, environmental protection, and other causes, aiming to inspire others to take action.