the quality of being impenetrable (by people or light or missiles etc.)
同义词：imperviousness
incomprehensibility by virtue of being too dense to understand
同义词：impenetrableness
impenetrability详细解释
im.pen.e.tra.bil.i.ty n.（名词）The quality or condition of being impenetrable.不能贯穿：不能通过的状态或性质The inability of two bodies to occupy the same space at the same time.不可入性：两个物体不能在同一时间占据同一个空间
