沉陷[ chén xiàn ]

⒈ 地面或构筑物等的基础陷下去。例路基沉陷了。英sink; settle cave in;

⒉ 由于构筑物下面的底土或土层受到压缩或发生移动而引起构筑物的下陷。例不均匀沉陷。英settlement; subsidence;

⒊ 比喻深深地进入某种境界或思想活动中。英contemplate; be lost in a muse;