radicalise

Verb

radicalize (third-person singular simple present radicalizes, present participle radicalizing, simple past and past participle radicalized)

1. (transitive) To make radical.
   • The goal of the Cultural Revolution was to radicalize the whole society, to create mass participation at all levels of decision-making, and to restore the revolutionary élan of the 1940s.1971, Deborah S. Davis, “The Cultural Revolution in Wuhan”, in The Cultural Revolution in the Provinces, Harvard University Press, →ISBN, →LCCN, →OCLC, →OL, page 159
2. (intransitive) To become radical; to adopt a radical political stance.
   • He’s a delight and provides a little break in one’s timeline between heart-stopping political developments, at least until he himself radicalizes, which is bound to happen soon, because he is a French bulldog.2017 March 7, Caitlin Lovinger, “A Deadly Sin”, in The New York Times