adj.极度焦躁不安的，忧虑失常的，发狂的，痴呆的

The once vibrant old man had become demented, his memories and personality fading away.
这位曾经活力四射的老人变得痴呆了，他的记忆和个性逐渐消逝。
The demented king issued irrational decrees, confusing his court and causing chaos in the kingdom.
痴迷的国王颁布了不合理的法令，使他的朝廷困惑，并在王国中引起了混乱。
The horror movie portrayed a demented serial killer stalking his victims through dark alleyways.
恐怖电影描绘了一个精神错乱的连环杀手在黑暗的小巷中跟踪他的受害者。
After the accident, she suffered from demented hallucinations, unable to distinguish reality from fantasy.
事故发生后，她开始出现精神失常的幻觉，无法区分现实与幻想。
The demented laughter echoing through the abandoned asylum sent chills down everyone's spine.
废弃精神病院里回荡的疯狂笑声让每个人的脊背都感到一阵寒意。
Years of solitude had driven him demented, talking to imaginary friends in empty rooms.
多年的孤独使他变得精神错乱，在空房间里与想象中的朋友对话。
The demented behavior of the formerly gentle teacher shocked the entire community.
这位原本温和的教师展现出的精神错乱行为震惊了整个社区。
The novel explores the mind of a demented protagonist, revealing the intricacies of mental decay.
这部小说探讨了一个精神错乱主角的内心世界，揭示了精神衰退的复杂性。
The demented artist's paintings, though disturbing, were also hauntingly beautiful.
那位精神错乱艺术家的画作虽然令人不安，却也有一种难以言喻的凄美。
The family struggled to care for their demented grandmother, whose once-clear mind was now a谜.
家人努力照顾他们患有痴呆的祖母，她那曾经清晰的思维现在变得如同谜一样难以理解。