praepostor
/ˌpriːˈpɒstə(r)/(亦作prepostor)
noun
- Brit.(at some public schools) a prefect or monitor〈英〉（某些公学）监督生, 班长。
词源
mid 18th cent.: from praepositor, alteration of Latin praepositus 'head， chief'， past participle of praeponere 'set over'， from prae 'ahead'+ponere 'to place'.