quenchlessness

Example:His desire to succeed carried an inextinguishability that no obstacle could defeat.

Definition:The quality of not being able to be extinguished or put out, often metaphorically used to describe an unquenchable desire.

Example:Her indomitability in pursuit of her goals made her an unstoppable force in the industry.

Definition:The quality of being impossible to subdue or control, often used in the context of an unyielding desire or passion.