adj. 1.疯癫的，精神错乱的。 2.疯狂的；极端愚蠢的。 3.为收容精神病人而设的。 n. 1.精神病人，疯子。 2.狂人，怪人，愚人。
a reckless impetuous irresponsible person 同义词：daredevil, madcap, hothead, swashbuckler, harum-scarum,
an insane person 同义词：madman, maniac,
insane and believed to be affected by the phases of the moon 同义词：moonstruck,
"Lunatic" is an informal term referring to people who are considered mentally ill, dangerous, foolish or unpredictable; conditions once called lunacy. The term may be considered insulting in serious contexts, though is sometimes used in friendly jest.
例句与用法
1.
Was he crazy? do you think he was a lunatic ? 他疯了吗？你说他是不是有神经病。
2.
The lunatic was carefully guarded . 对疯子严加看守。
3.
I rejoined that the klan is a more lunatic splinter group . 我回答说三K党只不过是神经失常的一小撮。
4.
He saved like a lunatic squirrel for a new ice age . 他很象一只为防备新冰川期来临而积攒粮食的松鼠。
5.
You're a lunatic . 你真是个大傻瓜。
6.
His second wife died in a lunatic asylum. it was in the blood . 他的第二个太太是在疯人院里死去的。那是遗传病。
7.
I might as well have struggled with a bear, or reasoned with a lunatic . 我还不如跟只熊搏斗，或是跟疯子论理还好些。
8.
I know that there used to be such lunatic affairs as divorce courts . 我知道以往曾经有过离婚法庭之类丧心病狂的玩艺儿。
9.
Moreover it was filled with a sort of exaltation, a lunatic intensity . 此外，还充满了一种兴奋的表情，紧张得近乎疯狂。
10.
He was like a lunatic reigning in a madhouse over an imaginary kingdom . 他好似一个在疯人院里统治着一个想象王国的精神病人。
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