The term 'feudal worker' refers to a type of labor system that was prevalent in Europe during the Middle Ages. The two most common types of feudal workers were serfs and esnes. Serfs were peasants who were bound to the land and had to provide labor and services to their lord in exchange for protection and the use of land. Esnes were skilled laborers who were hired by lords to perform specific tasks, such as carpentry or blacksmithing. Both serfs and esnes were considered part of the feudal system and were subject to the laws and customs of the time.