What does agitator mean?
An agitator is a person who actively stirs up public feeling, urging others toward protest, reform, or political action. The term carries a strongly pejorative charge in everyday use: authorities and opponents often label campaigners 'agitators' to suggest they are troublemakers rather than legitimate leaders, while sympathetic writers may use it approvingly for tireless activists. A second, wholly unrelated sense belongs to engineering: an agitator is any device — from the central post of a top-loading washing machine to industrial tank mixers — that shakes or stirs liquids and materials. The word derives from the Latin verb agitare, meaning 'to drive, move, or shake repeatedly', entering English in the early modern period alongside its parent verb 'agitate'. Its dual life makes it a striking example of how one word can describe both a human firebrand and a humble household part.
A person who urges others to political or social action, often by stirring up public feeling or unrest.
"The pamphleteer was denounced in Parliament as a dangerous agitator."
Often pejorative when used by opponents of a movement.
A device that shakes or stirs a liquid or mixture.
"The chemist adjusted the agitator speed to keep the solution uniform."
Standard regular plural; used for both people and devices.
"The government claimed foreign agitators were behind the protests."
Before it meant a political firebrand, 'agitator' was coined in English as the agent of 'agitate' — and today it can be either a rabble-rouser or the spindle in your washing machine.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of agitator
Agitator comes from the Latin verb agitare, meaning 'to set in motion, drive, or shake', itself a frequentative form of agere ('to do, drive'). It entered English in the late sixteenth or early seventeenth century as the agent noun of 'agitate'. Cognates sharing this Latin root include 'agitation' and 'agile'; the sense of one who stirs up political feeling became prominent during the English Civil War era, when radical groups such as the Levellers were known as 'Agitators' in the New Model Army.
Related word forms
How agitator is actually used
In political contexts the word is usually pejorative, implying someone who stirs up trouble rather than leads constructively; in neutral or historical writing it can simply denote a campaigner. The mechanical sense is entirely neutral and common in engineering and appliance contexts.
Easily confused with agitator
Agitprop refers to political propaganda, especially art or literature designed to agitate, whereas an agitator is the person (or device) doing the stirring.
An irritator merely annoys; an agitator deliberately stirs up collective action or, mechanically, mixes material.