vassal
noun
°The grantee of a fief, feud, or fee; one who keeps land of a superior, and who vows fidelity and homage to him, normally a lord of a manor; a feudatory; a feudal tenant.
°A subject; a dependant; a servant; a slave.
adjective
°Resembling a vassal; slavish; servile.
verb
°To treat as a vassal or to reduce to the position of a vassal; to subject to control; to enslave.
°To subordinate to someone or something.