lu·na·cy
noun/ˈluːnəsi/
/ˈluːnəsi/
[uncountable]- behaviour that is stupid or crazy
愚蠢的行为；疯狂 - It's sheer lunacy driving in such weather.
天气这样糟糕还开车，真是疯了。 - a comedy show full of inspired lunacy
充满灵感的疯狂喜剧表演
- It's sheer lunacy driving in such weather.
- (old-fashioned, often offensive) mental illness
精神病；精神错乱；精神失常
Word Originmid 16th cent. (originally referring to intermittent insanity believed to be caused by changes of the moon): from lunatic + -acy.