outcaste

1.he has deliberately elected to outcaste himself.

他故意选择成为贱民。

2.All men as brothers, even the outcaste,

甚至是不在四个种姓以内贱民。

3.The ethnic group Dan-min ("Boat Dwellers") was relegated as a outcaste in the Hongwu Reign of the Min Dynasty.Thereafter, Dan-min was discriminated for a very long time.

题目：建国后党和政府解决广东疍民问题举措及成效疍民自从明朝洪武年间被贬为贱民后一直备受歧视。