sī
take charge of
Depicts using a scepter and a mouth (口) to command or take control of something.
Components
Evolution

Oracle script
(~1250-1000 BC)
Bronze script
Mid Western Zhou (~900 BC)
Seal script
Shuowen (~100 AD)
Clerical script
Eastern Han dynasty (25-220 AD)Regular script
ModernDefinitions
Sources
季旭昇《說文新證》p.709