rad ‧ i ‧ cal ‧ ize BrE AmE ( also radicalise British English ) /ˈrædɪk ə laɪz/ verb [transitive]
[ Word Family: noun : ↑ radical , ↑ radicalism ; verb : ↑ radicalize ; adverb : ↑ radically ; adjective : ↑ radical ]
to make people accept new and different ideas, especially ideas about complete social and political change