1580s, "state of being insane," from Latin insanitatem (nominative insanitas) "unhealthfulness," noun of quality from insanus (see insane). Meaning "extreme folly" is from 1844.
词态变化
复数 insanities;
权威造句
1. Phillips murdered his wife, but got off on a plea of insanity.
菲利普斯谋杀了他的妻子，但以精神错乱为由逃脱了惩罚。
来自柯林斯例句
2. The insanity which ran in his family haunted him.
家族遗传的精神错乱困扰着他。
来自柯林斯例句
3. It was a period of collective insanity, of legalized murder and mayhem.
那是个集体丧失理智、谋杀与暴力合法化的时期。
来自柯林斯例句
4. The defence pleaded insanity, but the defendant was found guilty and sentenced.
