servitium liberum
servitium liberum (s[schwa]r-vish-ee-[schwa]m lib-[schwa]r-[schwa]m), n. [Law Latin] Hist. The service by a free tenant (not a vassal) to the lord, as by attending the lord’s court or accompanying the lord into military service. — Also termed liberum servitium; servitium liberum armorum.