base.ment
AHD:[b³s“m…nt]
D.J.[6beism*nt]
K.K.[6besm*nt]
n.（名词）
The substructure or foundation of a building.
建筑物的基础、根基
The lowest habitable story of a building, usually below ground level.
地下室：可居住的最低的建筑物楼层，通常在地平面以下
New England A public toilet, especially one in a school.