| sī | company/control/surname Si |
| 司 | surname Si |
| 司乘人员 | driver and conductor |
| 司令 | commanding officer |
| 司令台 | review stand |
| 司令员 | commander |
| 司令官 | commander officer in charge |
| 司令部 | headquarters military command center |
| 司仪 | MC; officiate; emcee; master of a ceremonies or a propramme; master of ceremonies; toast-master; compere |
| 司务 | official of miscellaneous affairs; workman; craftsman |
| 司务长 | supply chief |
| 司南 | compass in ancient China |
| 司号 | sound a bugle; bugler; trumpeter |
| 司号员 | bugler; trumpeter |
| 司各特 | Scott (name) Sir Walter Scott (1771-1832), Scottish romantic novelist |
| 司售人员 | bus crew driver and conductor |
| 司垒裁判 | a base umpire |
| 司天台 | Observatory or Bureau of Astronomy (official title) from the Tang dynasty onwards |
| 司寇 | two-character surname Sikou |
| 司尺员 | staff man; rod man |
| 司库 | treasurer; cashier |