insane
adjective uk/ɪnˈseɪn/ us/ɪnˈseɪn/
C2 疯癫的，精神失常的
mentally ill
For the last ten years of his life he was clinically insane. 在生命的最后10年，他处于临床上的精神失常状态。
informal I sometimes think I'm going insane (= I feel very confused). 我有时觉得自己快要疯了。
C1 疯狂的;荒唐的
extremely unreasonable or stupid
It would be insane not to take advantage of this opportunity. 如果不抓住这一机会的话那就太荒唐了。
insane
noun [ plural ] uk/ɪnˈseɪn/ us/ɪnˈseɪn/
the insane 精神病患者
mentally ill people
a hospital for the criminally insane 为患有精神病的犯人开设的医院