sepoy
/ˈsiːpɔɪ/noun
1- historical an Indian soldier serving under British or other European orders〈史〉（在英军等欧洲军队中服役的）印度兵。
1.1
- (in the Indian subcontinent) a police constable（印度次大陆）普通警察。
词源
from Urdu and Persian sipāhī 'soldier', from sipāh 'army'.