cistern
Word family nouncisterncisterna
cis·tern /ˈsɪstən $ -ərn/ noun [countableC] DHHa container in which the supply of water for a building is stored inside the building 〔建筑物内的〕水箱,贮水槽 SYN tank Origin cistern (1200-1300) Old French cisterne, from Latin cisterna, from cista “box”