The meaning of simple and unpretentious is: frugal, not flashy.
Simple and unpretentious, a Chinese idiom whose pinyin is pǔ sù wú huá, comes from "Yuan History·Wugu Sunze Biography": "It is often said that if a scholar is not frugal, he cannot cultivate integrity, and if he is not honest, he cannot cultivate virtue. The body is covered with cloth. After a few years of marriage, his wife was plain and unpretentious, and everyone said that she didn't take it seriously. "Idiom usage: used as a predicate, attributive, and adverbial about a person; sometimes it refers to a person's character.
2. Analysis of word meanings
1. Pu: pǔ, pò, pō, piáo. "?Pu" is simplified to "Pu". Simplify and save strokes based on ancient calligraphy. "Shuowen Jiezi": "Pu means wood bark. It comes from the sound of wood and divination." Burning the tortoise shell with moxibustion is a paradigm of divination. The two paradigms of wood and divination are superimposed. The thick and veined bark is the paradigm of simplicity.
2. Su (Pinyin: sù) is a general standard first-level Chinese character (commonly used character) in Chinese. This character first appeared in bronze inscriptions in the Western Zhou Dynasty, and may have originated even earlier. The original meaning of "Su" refers to unprocessed fine and natural silk fabrics. Later, it was extended to refer to white, and it was also extended to refer to the color of Yan Zebrother, which is not bright and elegant.
3. Nothing. The nothing mentioned in early Buddhist scriptures refers to the "non-being" relative to "being", that is, the "non-existence" relative to "existence".
4. Hua (Pinyin: huá, huà, huā) is a first-level standard Chinese character (commonly used character). This character was originally written in Western Zhou Dynasty bronze inscriptions. Its ancient character is shaped like a flower, and its original meaning refers to the flower of vegetation, pronounced huā. Used as a verb to refer to flowering. During the Southern and Northern Dynasties, the word "花" came into being, which was used in the meaning of flower. Flowers are beautiful, so "Hua" is also extended to mean brilliance and gorgeousness.