to make members of a tribe (= a social group of people with the same language, customs, and history, and often a recognized leader) stop following their traditional customs or social structure

During the 1920s, the federal government intensified its efforts to detribalize and assimilate American Indians. 在20世纪20年代，联邦政府加强了对美国印第安人的去部落化和同化工作。

The urbanization of Africans has been condemned on the ground that it "detribalizes" them. 非洲人的城市化受到谴责，理由是城市化让他们失去了原本的风俗习惯。