蠢
chǔn
stupid
sluggish; clumsy; to wiggle (of worms); to move in a disorderly fashion
他做了一个很蠢的决定，大家都摇头。
tā zuò le yī gè hěn chǔn de juédìng，dàjiā dōu yáotóu。
He made a very stupid decision, and everyone shook their heads.
你当时为什么说那种话？真的太蠢了。
nǐ dāngshí wèishénme shuō nà zhǒng huà？zhēn de tài chǔn le。
Why did you say something like that back then? That was really so stupid.