What does radicalize mean?
Radicalize means to make a person, organization, or movement more radical, usually in a political sense. A speaker, event, or policy may radicalize supporters by presenting existing institutions as unjust or by encouraging more confrontational forms of action. The verb can also be intransitive, as when a movement radicalizes over time as its members adopt increasingly extreme positions. The word often carries a warning or critical implication: it suggests not merely strong criticism of a particular policy but a push toward fundamental change. In British English, "radicalise" is the usual spelling, while "radicalize" is standard in American English and also accepted in Britain. Because the term can describe either deliberate persuasion or an unintended ideological shift, its precise connotation depends on context.
verbTo make someone or something more politically radical, or to adopt a more radical position. It can also be used intransitively to describe people or groups becoming increasingly radical.
- To make someone or something politically more radical.
- To become politically more radical.
"The new campaign sought to radicalize the movement without alienating moderate supporters."
"Several commentators feared that the speech would radicalize parts of the opposition."
"The organization gradually radicalized as its members became involved in direct action."
To radicalize is to push a belief beyond reform toward a more fundamental transformation of the existing order.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does radicalize come from?
The word was formed in English by combining "radical" with the suffix "-ize." "Radical" ultimately comes through Latin from radix, meaning "root," and in its earliest English uses referred to a root, especially in mathematics and chemistry. Its political sense developed during the early modern period, when "radical" came to mean favoring fundamental change rather than reform within existing institutions. The verb "radicalize" follows this later political development of its base word.
Related word forms
How radicalize is actually used
The word is especially associated with political and social movements. It may imply a deliberate effort to encourage radical attitudes, although it can also describe an unintended process. The spelling "radicalise" is standard in British English.