lunacy

名词 lunacy:

1. obsolete terms for legal insanity
   同义词：madness, insaneness
2. foolish or senseless behavior
   同义词：folly, foolery, tomfoolery, craziness, indulgence

1. It's sheer lunacy driving in this weather.
   天气这麽坏还开车，简直是疯了。

lu.na.cy

n.（名词）
【复数】 lu.na.cies
Insanity, especially insanity relieved intermittently by periods of clear-mindedness.See Synonyms at insanity
精神错乱：精神错乱，尤其是有清醒的时间间歇参见 insanity

Great or wild foolishness.
极度的愚蠢：很愚蠢或极端的笨
A wildly foolish act.
极端愚蠢之行为：极端愚蠢的行为
Archaic Intermittent mental derangement associated with the changing phases of the moon.
【古语】 月汐性精神错乱：与月亮的变化周期有关的间歇性的精神错乱

来源：
From lunatic
源自 lunatic