radical

Definition

Favoring fundamental change, or change at the root cause of a matter.

Etymology

PIE word *wréh₂ds Inherited from Middle English radical, from Latin rādīcālis (“of or pertaining to the root, having roots, radical”). Compare grassroots.

Example Sentences

• "His beliefs are radical."
• "The most determined exertions of that authority, against them, only showed their radical independence."
• "The spread of the cancer required radical surgery, and the entire organ was removed."

Related Words