"Tang Yun" states the pronunciation is the fanqie of chang and zhen, pronounced chen (rising tone). "Ji Yun" states the pronunciation is the fanqie of cheng and ren, pronounced chen (rising tone). "Shuowen Jiezi" states this character is the same as "chen". Also, "Guang Yun" and "Ji Yun" state the pronunciation is the fanqie of er and zhen, pronounced ren (falling tone). "Leipian" explains it as the appearance of looking. Another explanation is the meaning of dizziness. There is also "nong xuan", meaning vexation. For a detailed explanation, see the annotation for the character "xuan". "Ji Yun" states this character is the same as "yan". Also, "Yupian" states the pronunciation is the fanqie of he and ren, pronounced zhen (falling tone). It also means dizziness and vexation.