Pronounced gu hun (falling tone) in "Tang Yun" (Tang Yun), and gong hun (falling tone) in "Ji Yun" (Ji Yun) and "Yun Hui" (Yun Hui), with the same pronunciation as "kun." "Shuowen Jiezi" (Shuowen Jiezi) explains it as "ji." "Guang Yun" (Guang Yun) explains it as close-fitting underwear. "Guang Ya" (Guang Ya) explains it as "pei gun." It also states that people in the Chu region call a "gun" . In "Shuowen Jiezi" (Shuowen Jiezi), it is sometimes written as . In "Leipian" (Leipian), it is sometimes written as .