What are the differences and connections between words and words that explain words?

There are some differences and connections between them:

Simply put, "Wen" is hieroglyphics, such as "day" and "month". Words can't be decomposed, and they are single words, so they can only be interpreted, so they are called "saying" and explanation. As for the word "Zi", it is called "Zi" because the form and sound complement each other. Xu Shen believes that the combination of sound and form is called "sub" and can be decomposed. Explain what is a glyph and what is a note. The significance of Shuo Wen Jie Zi is that it is a book to explain words.

Brief introduction of Shuo Wen Jie Zi;

Shuowen Jiezi, or Shuowen for short, is a Chinese reference book compiled by Xu Shen, a Confucian scholar and linguist in the Eastern Han Dynasty. Shuowen Jiezi is the earliest Chinese dictionary that systematically analyzes the forms of Chinese characters and studies the etymology in China, and it is also one of the earliest dictionaries in the world.

There are fifteen volumes in Shuo Wen Jie Zi, of which the first fourteen volumes are written exegesis, and the prefix is written in Xiao Zhuan. When this book was compiled, the "Six Books" was explained in detail for the first time, and the source of fonts was explained word by word. The fifteenth volume is the preface, which records the emergence, development, function and structure of Chinese characters and the purpose of the author's creation. Shuowen Jiezi is the earliest radical dictionary in China.

Refer to the above? Baidu encyclopedia-interpretation of words and texts