Most of the words with the word "moon" on the left are basically from the misspelled word "meat", which is very similar in Xiao Zhuan, but when it is used as a single word, "meat" has been transformed into the writing of two people in it now, but as a radical, it is exactly the same as "moon", so "muscle", "fat" and "meat"
The word "fat" had nothing to do with the meaning of fat. The word originally meant "sacrifice half for sacrifice", but the meaning of fat was attached to the word, similar to the word "fat" written in the way of "training and reading" Later, the word "lick" was developed. The meaning of fat pays more attention to pronunciation, so it can be attached to this word.
Chinese characters are often distorted or corrupted in the process of evolution, so it is impossible to judge the meaning simply by regular script characters. Moreover, not every Chinese character can be interpreted from pictographs or knowing words, and most of them are pictographs, and the phonetic symbols of pictographs are not necessarily meaningful.