oppressed people; discriminated ethnicity
Refers to ethnic groups or peoples subjected to systematic oppression or discrimination. Often used in historical, political, or sociological contexts.
It is important to learn the history of oppressed peoples.
That policy ignores the rights of discriminated ethnicities.
少数民族 means 'ethnic minority' without necessarily implying oppression; 被圧迫民族 explicitly denotes groups that are oppressed or discriminated against.
Compound of 被 (hi, 'subjected to'), 圧迫 (appaku, 'oppression'), and 民族 (minzoku, 'ethnic group/people'). The exact historical origin is uncertain, but it follows standard Sino-Japanese word formation patterns.