radicalize

American  

[rad-i-kuh-lahyz] / ˈræd ɪ kəˌlaɪz /

especially British, radicalise

verb (used with object)

• radicalizes,
  present (3rd person singular)
• radicalized,
  past participle,  past
• radicalizing
  present participle

1. to make radical or more radical, as in politics.

   young people who are being radicalized by extremist philosophies.

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verb (used without object)

• radicalizes,
  present (3rd person singular)
• radicalized,
  past participle,  past
• radicalizing
  present participle

1. to become radical or more radical.

   The regime has increasingly radicalized since the coup.

radicalize British  

/ ˈrædɪkəˌlaɪz /

verb

1. to make (a person) more radical

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Other Word Forms

Derived Forms

• radicalization
  noun

Inflected Forms

Participles

• radicalizing
  present
• radicalized
  past

Conjugated Forms

Present

• radicalize
  simple
• radicalizes
  simple
• have radicalized
  perfect
• has radicalized
  perfect
• am radicalizing
  progressive
• are radicalizing
  progressive
• is radicalizing
  progressive
• have been radicalizing
  perfect progressive
• has been radicalizing
  perfect progressive

Past

• radicalized
  simple
• had radicalized
  perfect
• was radicalizing
  progressive
• were radicalizing
  progressive
• had been radicalizing
  perfect progressive

Future

• will radicalize
  simple
• will have radicalized
  perfect
• will be radicalizing
  progressive
• will have been radicalizing
  perfect progressive

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Etymology

Origin of radicalize

First recorded in 1815–20; radical + -ize

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Explanation

To radicalize someone is to shift a person or group's opinions toward either end of the political spectrum. The word comes up a lot during times of political upheaval or revolution when people’s opinions stray far from the mainstream. To radicalize people is to cause a shift in their beliefs that make them want to take action for social reform. Once they’re radicalized, they'll want big political or social changes and work to make them happen. Personal experience is often radicalizing — sexism, racism, poverty, and perceived injustices radicalize many people to try to change the world. The word can have a darker meaning when radicalization leads to politically motivated violence.

Example Sentences

See Examples For:

radicalize radicalizes radicalized radicalizing

Investigators are looking into the possibility he began to radicalize in the war-torn country where Islamist rebels fought against the ruling Assad regime, the people said.

From The Wall Street Journal ● Oct. 3, 2026

Haji Zada, who has been living in Fort Worth, Texas, was accused by prosecutors of being the "matriarch" of the group, who had worked "to radicalize the family".

From BBC ● Sep. 12, 2026

While darkly amusing, this is genuinely dangerous; movements that believe themselves to be comprehensively infiltrated tend to radicalize further and faster.

From Salon ● Apr. 25, 2026

They don’t seem to understand how much the internet can radicalize people.

From Slate ● Dec. 5, 2025

But also back end: “How can we radicalize what the gallery system is?”

From Los Angeles Times ● Feb. 27, 2024

The ploughman wants to play by the rules, but it’s how the revolt plays out that radicalizes him.

From Los Angeles Times ● Sep. 11, 2026

"We need to have a broader discussion about how the 'extinction risk' rhetoric radicalizes the most vulnerable individuals," Weiss-Blatt said.

From Barron's ● Apr. 29, 2026

“Those people are also living in the U.K. and being fed misinformation that is dangerous, that radicalizes people,” Haugen said.

From Washington Times ● Oct. 25, 2021

But what radicalizes some girls will demoralize others.

From Slate ● Jun. 1, 2018

Then, a canted, glass-and-stainless-steel building, in the shape of a parallelogram, radicalizes the streetscape.

From New York Times ● Jun. 6, 2013

Authorities believe that the girl was radicalized in the same extremist online networks as Vazquez and Clark and communicated with them using the messaging platform Signal, O’Neill said.

From Los Angeles Times ● Aug. 31, 2026

But officials didn’t provide any details about the writings or ideology, adding that they were still going through electronic devices and examining the suspects’ online presence to determine how they were radicalized.

From Los Angeles Times ● May 20, 2026

He didn’t provide details on how they may have been radicalized.

From The Wall Street Journal ● May 19, 2026

"With Artificial Intelligence, though, it feels more extreme," she added, noting that Moreno-Gama was radicalized through the "'AI existential risk' rhetoric" rather than its employment or environmental impacts.

From Barron's ● Apr. 29, 2026

“You never know, man. I mean, people get radicalized, right? Maybe somebody knows something about that dude that we don’t. You should have seen him yesterday when he got into it with Drew.”

From "Here to Stay" by Sara Farizan

Critics blamed doomsday rhetoric for radicalizing young men, while the movement itself, including Stop AI, denounced violence and tried pivoting to a gentler brand of advocacy.

From The Wall Street Journal ● Jul. 12, 2026

I’ve been reading “The Power of Fun: How to Feel Alive Again” by Catherine Price, and it’s been quietly radicalizing my afternoons.

From Salon ● Nov. 18, 2025

“If the rationale had been to combat misinformation or protect against algorithms radicalizing people into terroristic behavior, I’d be like, ‘Yeah, let’s do this,’” she says.

From Science Magazine ● Mar. 18, 2024

Last month, victims’ relatives filed a lawsuit claiming tech and social media giants such as Facebook, Amazon and Google bear responsibility for radicalizing Gendron.

From Seattle Times ● Aug. 16, 2023

YouTube and social media sites chase clicks so intently that they can inadvertently create algorithms that hook users with increasingly salacious and radicalizing content.

From Slate ● Mar. 1, 2023

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