de-, 向下，离开。-ment, 思想，词源同mind. 指思想偏离正轨的，发狂的。

1. He had been granted his own TV show by some demented executive.

某个愚蠢的主管已经批准他自己来做一个电视节目。

2. Nursing a demented person is an all-consuming task.

照顾一个精神病人是时刻都要劳神费力的苦差事。

3. I've been nearly demented with worry about you.

我一直为你担心，都快发疯了。

4. At what point does it become necessary to place a demented person in a nursing home?

到了什么时候算是有必要把早老性痴呆病人送到养老院去？

5. Sid broke into demented laughter.

锡德狂笑起来。