以《汉语大字典》、《现代汉语词典》等为代表的各种字典辞书以及古代汉语、古代文学教育在分析说解“介”的词义时,大都沿袭了《说文解字》的释义,以“疆界”为其词义引申的基础。通过对“介”的古文字形体(甲骨文、金文等)的考察,以及对先秦以来文献典籍中“介”一词的各种用例分析,得出如下结论:“介”的本义是“铠甲”,以此为核心引申出“甲士、辅助、疆界、突出、中介、介绍”等多种词义;“介”还是“芥草、纤介”等假借义;“界、芥”是“介”的后起分化字。 Dictionaries and dictionaries represented by “Chinese Dictionary” and “Modern Chinese Dictionary”, as well as ancient Chinese and ancient literature education, mostly follow the definition of “Shuo Wen Jie Zi” when analyzing and explaining the meaning of “Jie” The basis of extending the meaning of “boundary”. Through the analysis of the ancient Chinese characters (such as Oracle and Jinwen) and the analysis of various use cases of the word “mediated” in documents and documents since the pre-Qin period, the author draws the following conclusion: The original meaning of “mediated” is “armor” , As a core to extend the meaning of “Jiashi, Auxiliary, Boundary, Prominent, Intermediary, Introduction” and other meanings; “mediated” or "false mustard, After the word differentiation.