catacomb
noun [ C usually plural ] uk/ˈkæt.ə.kuːm/ us/ˈkæt̬.ə.kuːm/
（旧时由纵横通道和若干房室构成的）地下墓穴
a series of underground passages and rooms where bodies were buried in the past
They went down into catacombs beneath the church. 他们进入了教堂的地下墓穴。