Meaning

verb put in possession of land in exchange for a pledge of service, in feudal society

originFrom Late Middle English enfeffen, enfeoffen (“to grant (property, rights, etc.) under the feudal system”) [and other forms], from Old French enfeffer, enfieffer (compare Anglo-Latin infeoffāre, Anglo-Norman enfeoffer), from en- (prefix meaning ‘in, into’) + fief (“estate held by a person on condition of providing military service to a superior”) (ultimately from Proto-Indo-European *peḱu-…

Etymology from Wiktionary, CC BY-SA 3.0