foolish 
英 [ˈfuːlɪʃ]  美 [ˈfuːlɪʃ] 
adj. 愚蠢的；荒谬的

例句：
It would be foolish to raise hopes unnecessarily. 

心存奢望是不明智的。

Firing coach Barker would be a very foolish mistake. 

解雇巴克教练会是个非常愚蠢的错误。

I just stood there feeling foolish and watching him. 

我只是站在那儿看着他，觉得自己好傻。

You're being very foolish, giving away money like that. 

你像那样赠送钱财是十分愚蠢的。

That is a very, very foolish idea. 

那是个非常非常可笑的想法。