folly
/ˈfɔlɪ; `fɑlɪ/ n
1 [U] ~ (to do sth) foolishness; lack of wisdom 愚蠢; 愚笨
an act of folly 愚蠢之举
It's utter folly to go swimming in this cold weather. 这麽冷的天气还去游泳, 真是蠢透了.
2 [C] foolish or unwise act, idea or practice 愚蠢的行为、 思想或做法
You'll pay later for your follies. 你以後要为你的愚蠢行动付出 代价的.
3 [C] very expensive ornamental building that serves no practical purpose 华而不实的建筑.