BONDAGE

noun Etymology: Middle English, from Anglo-French, from bonde customary tenant, from Middle English Date: 14th century the tenure or service of a villein, serf, or slave, a state of being bound usually by compulsion (as of law or mastery): as, captivity , serfdom, servitude or subjugation to a controlling person or force , sadomasochistic sexual practices involving the physical restraint of one partner