unsoundness

The inspector reported the unsoundness of the old warehouse floor before anyone was allowed inside.

用法提示：此处 unsoundness 是不可数名词，表示结构损坏或不牢固的状态。

The student explained the unsoundness of the theory by pointing out its basic contradiction.

用法提示：此处 unsoundness 是名词，指论点或理论谬误、缺乏依据。

After months of strange behavior, the family became worried about the unsoundness of his mind.

用法提示：此处 unsoundness 是名词，表示心智不健康或不健全的状态。