Someone who is insane has a mind that does not work in a normal way, with the result that their behaviour is very strange.
例句
Some people simply can't take it and they just go insane...一些人完全承受不了，结果就精神失常了。Agnes was a battered woman who had killed, in self-defense, while temporarily insane.阿格尼丝是个备受虐待的女人,她在一时精神错乱下出于自我防卫杀了人。
ADJ-GRADED
蠢极的;荒唐的
If you describe a decision or action as insane, you think it is very foolish or excessive.
例句
I said, 'Listen, this is completely insane.'我说：“听着,这简直荒唐之极。”...insane jealousy.不可理喻的嫉妒心
英英词典释义
Adverb
1. in an insane manner;
"she behaved insanely""he behaves crazily when he is off his medication""the witch cackled madly""screaming dementedly"
2. (used as intensives) extremely;
"she was madly in love""deadly dull""deadly earnest""deucedly clever""insanely jealous"