radicalize

radi|cal|ize /r'ædɪkəlaɪz/ (radicalizes radicalizing radicalized)
in BRIT, also use radicalise
[VERB] V n, V-ed, V-ing
If something radicalizes a process, situation, or person, it makes them more radical.
He says the opposition will radicalize its demands if these conditions aren't met.
...women radicalized by feminism...
The trial was a radicalizing experience for her.
● radicalization [N-UNCOUNT] oft N of n
...the radicalization of the conservative right.