folly [ˈfɒli]

以下由轻松背单词网站提供

n.愚笨，愚蠢，蠢事，蠢行，傻话

stupidity , or a stupid action , idea ,

Learn wisdom by the folly of others. 从别人的愚蠢行动中学到智慧。
Events proved the folly of such calculations. 事情的进展证明了这种估计是愚蠢的。