Tang Yun (Tangyun) and Jiyun (Jiyun) record its pronunciation as fen. The Shuowen Jiezi (Shuowen Jiezi) defines it as a type of fragrant tree. Additionally, Shuowen Jiezi (Shuowen Jiezi) and Jiyun (Jiyun) record another pronunciation for it as fen. The meaning is the same. Leipian (Leipian) mentions that the character fen is sometimes written in the variant form mu. There are also instances where it is written in a simplified form as fen.