A more thorough explanation:

Definition: Quamvis non potuerit dare (kwam-vis non pah-tyoo-air-it [or pah-choo-] dair-ee) is a Latin legal term that means "although he had not been able to give or administer it."

Example: A person may be named as the executor of a will, but if they are unable to fulfill their duties due to illness or death, the court may appoint a substitute executor to administer the estate. In this case, the substitute executor would be appointed quamvis non potuerit dare, meaning that although the original executor was unable to administer the estate, the substitute executor can step in and fulfill their duties.

The example illustrates how the term quamvis non potuerit dare is used in a legal context to describe a situation where someone is unable to fulfill their duties, but someone else can step in and take over.