1580s, "state of being insane," from Latin insanitatem (nominative insanitas) "unhealthfulness," noun of quality from insanus (see insane). Meaning "extreme folly" is from 1844.
雙語例句
1. Phillips murdered his wife, but got off on a plea of insanity.
菲利普斯謀殺了他的妻子，但以精神錯亂為由逃脫了懲罰。
來自柯林斯例句
2. The insanity which ran in his family haunted him.
家族遺傳的精神錯亂困擾著他。
來自柯林斯例句
3. It was a period of collective insanity, of legalized murder and mayhem.
那是個集體喪失理智、謀殺與暴力合法化的時期。
來自柯林斯例句
4. The defence pleaded insanity, but the defendant was found guilty and sentenced.