基本释义
adj. 发狂的，疯狂的；精神错乱的
v. 精神错乱；变得痴呆（dement的过去分词）
星级词汇
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助记提示
1. mental => demented.
英文词源
demented 发狂的
de-, 向下，离开。-ment, 思想，词源同mind. 指思想偏离正轨的，发狂的。
详细用法
形容词用法：
- Demented person: 疯狂的人
- Demented behavior: 疯狂的行为
- Demented individual: 疯狂的个体
- Demented mind: 疯狂的思维
- Demented state: 疯狂的状态
- Demented actions: 疯狂的举动
- Demented laughter: 疯狂的笑声
- Demented ranting: 疯狂的胡言乱语
- Demented expression: 疯狂的表情
- Demented gaze: 疯狂的凝视
其他用法：
- To be declared demented: 被宣布为疯狂
- To exhibit demented behavior: 表现出疯狂行为
- To suffer from a demented mind: 遭受疯狂思维
- To have a demented outlook on life: 对生活持有疯狂的看法
- To be driven demented by loneliness: 因孤独而发疯
- To be considered demented by society: 被社会认为是疯狂的
- Demented by grief: 因悲伤而疯狂
- To unleash a demented scream: 发出疯狂的尖叫声
深度学习
demented (duh MEN ted) Here’s an adjective that means “loss of intel-lectual faculties such as memory, concentration, or judgment.” People suffering from dementia (the noun form) have a kind of illness that comes from an organic disease of the brain.
- Mrs. Wilson’s dementia had progressed to the point where she needed a full-time companion who would make sure she didn’t wander out of the house in her pajamas.
- In his demented state, Harry Lyme could not remember the name of his wife or the address of their home.
——摘自《Fiske WordPower: The Most Effective System for Building a Vocabulary That Gets Results Fast》
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痴呆症（duh MEN ted）这里有一个形容词，意思是“丧失记忆、专注力或判断力等智力”。患有痴呆症（名词形式）的人有一种来自大脑器质性疾病的疾病。
威尔逊夫人的痴呆症已经发展到需要一个全职伴侣的地步，她要确保自己不会穿着睡衣走出家门。
在精神错乱的状态下，哈里·莱姆记不起妻子的名字或他们家的地址。
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