Folly
Definition 1 of 3
Pro Tip 1/3
Negative Connotation
The word 'folly' often implies a negative judgment or disapproval of the action or belief. Ignoring her advice was pure folly.
Pro Tip 2/3
Not Always Serious
'Folly' can be used for minor mistakes as well as serious errors in judgment. Missing the meeting due to oversleeping was a small folly.
Pro Tip 3/3
Subjective Term
What one person sees as 'folly' might be considered reasonable by someone else. Some saw her solo travel as folly; others admired it.