A more thorough explanation:

Super praerogativa regis is a legal term in Latin that refers to a writ used in historical times. This writ was used against the widow of a tenant of the king who remarried without the permission of the king.

For example, if a man held land from the king and died, leaving his widow as the tenant, she was not allowed to remarry without the king's permission. If she did remarry without permission, the king could use the writ of super praerogativa regis to take possession of the land.

Another example is if a widow remarried without permission and had children with her new husband, those children would not be considered legitimate heirs to the land. Instead, the land would revert back to the king.

These examples illustrate how the writ of super praerogativa regis was used to maintain the king's control over land ownership and inheritance.