Webster’s Revised Unabridged Dictionary · 1913
Radically
Rad′i·cal·ly (răd′ĭ·kal·ly̆), adv. 1. In a radical manner; at, or from, the origin or root; fundamentally; as, a scheme or system radically wrong or defective.
2. Without derivation; primitively; essentially. [R.]
These great orbs thus radically bright. Prior.