The materialist, liege to his own system, is incapable of doing anything but put one after another the results of his observations.
-- Agostino Da Montefeltro, Conferences Of; Delivered in Rome During Lent 1889
Subjects were required to give their liege to their lord.
-- Paul L. Williams, The Complete Idiot's Guide to the Crusades
Liege is of uncertain origin. It either came from the Middle English word leidig meaning "free" or from the Late Latin word for serf, laeticus. Both roots identified the relationship between a vassal, or serf, and his superior.