basement
/ˈbeɪsmənt/noun
1- the floor of a building which is partly or entirely below ground level地下室。
1.1
- Geology the oldest formation of rocks underlying a particular area【地质】基底; 基岩, 基底杂岩。
词源
mid 18th cent.: probably from archaic Dutch basement 'foundation'， perhaps from Italian basamento 'column base'.