0 the fact of being stupid, or a stupid action, idea, etc. -- locura
1 foolishness -- locura
the follies of youth.
This is folly and, say what you will, it is simply unacceptable.
As a result of this stagnation, the two peoples are becoming a little more entrenched every day in this murderous folly and in poverty.
It would be sheer folly to believe unanimity could ever be reached on complicated matters, and especially on foreign policy.
With that contribution, he gives us evidence that he is an expert on political folly.
In doing so, he became a byword for arrogant folly.
I am sure that all the various attack helicopters have their good points, but spending money on developing four of them wholly or in part is folly.