“部首”一词来自《说文序》。《说文序》说:“分别部居,不相杂厕”;“其建首也,立一为耑”。前者意思是:分门别类,按部归类,不杂乱无章地放在一起。后者意思是:《说文》这书建立部首,立“一”部作为全书的开端。“部首”一词就是合“部居”之“部”和“建首”之、“首”二字而成。 The word “radical” comes from “Shuo Wen sequence.” “Said sequence of texts,” said: “Respectively, not mixed miscellaneous toilets”; “The first building also, the legislature as 耑.” The former means: categorized, classified by department, not messy together. The latter means: “Said the text” to establish the radical radical, the establishment of “a” Ministry as the beginning of the book. The word “radical” is the word “the first” formed by the “ministry” and “leader” of the ministry.