same as Fuxi 伏羲[Fu2 xi1], a mythical emperor; surname Xi
Depicts a weapon (我) slaughtering a pig for the purpose of sacrificing an animal for offering. The 我 component was later reanalyzed into phonetic component 義 and the component depicting the slaughtered pig was later reanalyzed as meaning component 兮. Based on the original meaning "sacrificial slaughter", now written as 犧. The current meaning is a phonetic loan.
《說文》：“羲，气也。从兮，義聲。”
sacrificial slaughter