The word 全部 is formed by combining two characters, each contributing its core meaning to create a new, unified concept. The first character, 全 (quán), means "whole" or "complete". The second, 部 (bù), means "part" or "section". Their combination is conceptually logical: "whole" + "parts" together express the idea of "all the parts" or "the complete assembly", thus arriving at the meaning of "entirety", "all", or "totality".