foolish

adj

1. Lacking good sense or judgement as a general trait; unwise; stupid.

   “His wife and the neighbours lamented over his strange conduct, his dullness and melancholy, and began to think that he was grown foolish.”

   “Next season will, as ever, be a different matter, another problem for Conte to solve as he looks to extend his personal record of four straight league titles in club football across England and Italy. Given his hunger for more – more time, more detail, more work – only the brave or the foolish would bet against him.”

2. (usually)Not based on good sense or judgement; as a fool would do or conclude.

   “As a political system democracy seems to me extraordinarily foolish, but I would not go out of my way to protest against it. My servant is, so far as I am concerned, welcome to as many votes as he can get. I would very gladly make mine over to him if I could.”

3. Resembling or characteristic of a fool.