What do we call a “lord” in a simple way?

The story behind the answer

In medieval feudalism, a lord was a member of the nobility who held a fief—land granted by a king or higher-ranking noble—in exchange for loyalty, counsel, and military support. Authority flowed from control of the manor and its resources: collecting rents, administering justice in manorial courts, and commanding the service of peasants and vassals. Power was tied to the soil, not to commerce or church office.

Titles varied by rank and region (baron, count, earl, duke), and lords often practiced subinfeudation, granting portions of their estates to knights who then owed them service. Castles served as residences and fortified administrative centers, symbolizing how landholding underpinned medieval political and military power.