expropriate \ek-SPROH-pree-ayt\ (transitive verb) - 1 : To deprive of possession. 2 : To transfer (the property of another) to oneself.
"You never know when some tinhorn general's going to expropriate your property as national patrimony." -- Douglas Preston, 'The Codex'
Expropriate comes from Medieval Latin expropriatus, past participle of expropriare, "to deprive of property," from Latin ex- + proprius, "one's own." The act of expropriating is expropriation. One who expropriates is an expropriator.