You Collection, Upper Volume
Radical: Speech (yán)
Kangxi Strokes: 19
Page 1181, Entry 14
According to the Collection of Rhymes (Jiyun), the ancient form of the character for mo is written as this character.
In the Guanzi (Guanzi), Shaping Chapter: One who is a wu-chen can be sent on far-reaching missions.
Commentary: This refers to a person whose words and actions are without equal; such an individual can be consulted regarding the long-term strategic plans of the state.
Also used as a personal name. This character, alongside the character wu, appears in the History of Song (Songshi), Table of the Imperial Clan.
According to the Expanded Rhymes (Guangyun), pronounced wu. According to the Collection of Rhymes (Jiyun), pronounced wu. The pronunciation is the same as the word for nothing. It is a term indicating inducement.
According to the Collection of Rhymes (Jiyun) and the Categorized Compilation (Leipian), pronounced wu (rising tone). The meaning is the same.
According to the Six Scripts Origins (Liushugu), it is written using the radical for speech and the character for nothing.