unlock
un.lock \-'la:k\ vt 1: to unfasten the lock of 2: OPEN, UNDO 3: to cause to open 4: to furnish a key to : DISCLOSE
Webster's English Dictionaryun.lock \-'la:k\ vt 1: to unfasten the lock of 2: OPEN, UNDO 3: to cause to open 4: to furnish a key to : DISCLOSE