fatuity
词根词缀：
fatuity n. 愚蠢，愚昧
fatu 笨 + ity 具备某种性质，状况 → 愚蠢，愚昧
fatuous adj. 昏庸的
fatu 笨 + ous 有…性质的，关于…的 → 昏庸的
infatuate v. 使糊涂；使迷恋
in 使… + fatu 笨 + ate 使… → 使糊涂；使迷恋
infatuation n. 热恋；着迷
infatuat 迷恋 + ion 动作或状态 → 热恋；着迷
数据来源：新东方英语词汇速记大全
相关例句：
Therefore, ignorance of history often leads to fatuity in politics.
历史的无知，往往导致政治上的昏庸。
His dismissal signaled the beginning of Emperor Xuanzong s fatuity and the decline of the great Tang Empire.
张九龄的命运和大唐国运息息相关，张九龄罢相标志着唐玄宗开始走向昏庸，大唐国运开始走向衰败。
Wang Luyan then to this kind of hold the fatuity, numbness of the society of value of having the money supremacy, cold carried on judgment.
王鲁彦则对这种持有金钱至上的价值观的社会的愚昧、麻木、冷酷进行了批判。
The purpose to learn for non-practical use and to break away from fatuity is the essence of science innovation.
为了求知和摆脱愚蠢而不为任何实用目的是科学创新的本意和目的所在；
It also encourages people to banish the fatuity, to be creative and push the social progress continuously.
它激励人们驱除愚昧，求是创新，并不断推动着社会的进步。
This is no doubt the first step out of confusion and fatuity.
这无疑是摆脱混乱与愚味的第一步。