In a radical manner; fundamentally; very. / At the root.

Favoring fundamental change, or change at the root cause of a matter. / (botany, not comparable) Pertaining to a root (of a plant). / Pertaining to the basic or intrinsic nature of something.

(historical, 19th-century Britain) A member of the most progressive wing of the Liberal Party; someone favouring social reform (but generally stopping short of socialism).

(transitive) To make radical. / (intransitive) To become radical; to adopt a radical political stance.

the process of radicalizing

present participle of radicalize

Any of various radical social or political movements that aim at fundamental change in the structure of society

plural of radical

the state or the quality of being radical.

simple past tense and past participle of radicalize