insane
/ɪnˈseɪn/adjective
1- in a state of mind which prevents normal perception, behaviour, or social interaction; seriously mentally ill精神错乱的; 有严重精神病的, 发疯的：
certifying patients as clinically insane
证明病人为精神病
he had gone insane.
他发疯了。
1.1
- (of an action or quality) characterized or caused by madness（行动或品性）疯狂的; 由疯狂引起的：
charging headlong in an insane frenzy
狂怒地迎头冲上前去
his eyes glowing with insane fury.
他眼里冒着疯狂的怒火。
1.2
- in a state of extreme annoyance or distraction狂怒的; 疯狂的：
a fly whose buzzing had been driving me insane.
嗡嗡作响地吵得我难以忍受的苍蝇。
1.3
- (of an action or policy) extremely foolish; irrational or illogical（行动或政策）极其愚蠢的; 不合理的：
she had an insane desire to giggle.
她傻乎乎地想格格笑出来。
派生词
insanely
adverb词源
mid 16th cent.: from Latin insanus, from in- 'not' + sanus 'healthy'.