Favoring fundamental change, or change at the root cause of a matter.
His beliefs are radical.
Pertaining to a root (of a plant).
Pertaining to the basic or intrinsic nature of something.
The most determined exertions of that authority, against them, only showed their radical independence.
A member of the most progressive wing of the Liberal Party; someone favouring social reform (but generally stopping short of socialism).
A member of an influential, centrist political party favouring moderate social reform, a republican constitution, and secular politics.
A person with radical opinions.
PIE word *wréh₂ds Inherited from Middle English radical, from Latin rādīcālis (“of or pertaining to the root, having roots, radical”).
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