Old Serf is a term used to describe a peasant in the feudal system of the Middle Ages. The Old Serf was a lower-class worker who was bound to the land and had to provide labor and services to the lord of the manor in exchange for protection and the use of land. The two crossword solutions, HELOT (5 letters) and ESNE (4 letters), are both terms used to describe a type of Old Serf. HELOT is an ancient Greek term for a serf or slave, while ESNE is an Old English term for a servant or laborer.