The word that is the most difficult to write in the world is usually regarded as the "其其" (dá) in Chinese characters in China. The writing of this word is complicated, consisting of 56 strokes, and its shape is similar to that of a dragon-shaped spine. Although this word is an uncommon word that is no longer used in modern Chinese characters, it was used frequently in ancient times. It is said that in some ancient cultural circles, this word was used as a totem of the clan or a symbol of the tribe.

As for how to pronounce this word, it is usually pronounced as "dá" according to the pronunciation of Putonghua. However, it should be noted that the pronunciation of this word may have different pronunciation and pronunciation methods in different ancient cultural circles.