1) Bind 2) Bring into captivity 3) Bring into servitude 4) Deprive of freedom 5) Dominate 6) Enthrall 7) Force into bondage 8) Force into servitude 9) Keep in thrall 10) Leave Essen in bondage 11) Make a bond servant of 12) Make a slave of 13) Make subservient 14) Place in bondage 15) Place into bondage 1) Subjugate 
• (v. t.) To reduce to slavery; to make a slave of; to subject to a dominant influence.
En·slave' transitive verb [ imperfect & past participle Enslaved ; present participle & verbal noun Enslaving .] To reduce to slavery; to make a slave of; to subject to a dominant influence. « The conquer'd, also, and enslaved
[v] - make a slave of
verb make a slave of; bring into servitude
to make a slave of; reduce to slavery: His drug addiction has completely enslaved him.