insane

/ˌɪnˈseɪn/

afflicted with or characteristic of mental derangement

中文释义：精神错乱的；疯狂的

The court declared the defendant insane and unfit for trial.

法庭宣布被告精神失常，不适合受审。

It would be insane to drive in such heavy fog without headlights.

在这样的大雾中不开车灯开车简直是疯了。