The character "部落" is formed conceptually by combining two pictographic ideas: the first character, 部, originally depicted a community or administrative division under a shared banner or authority, suggesting an organized group. The second, 落, evokes the image of plants (grass/leaves) falling to settle in a place, conveying the sense of a settled community or a location where people have "come to rest". Together, they create the composite idea of a "tribe", a social group that is both an organized unit (部) and a settled community rooted in a specific territory (落).