radically

Example:The system was improved fundamentally by this new software update.

Definition:in a thorough, basic or essential way; (almost solely in reference to changes that are perceived as being significant).

Example:He knew he had to thoroughly change his habits to improve his health.

Definition:to a great extent or degree; completely: to a significant or complete extent.

Example:She made a completely new start after losing her job.

Definition:in a manner extending to every part, every aspect; completely, entirely.

Example:The therapy offered a radically different approach to dealing with stress.

Definition:constituting or involving a fundamental change in the form, nature, or direction of something.