foolishly
🇺🇸
/ˈfuːlɪʃli/
🇬🇧
/ˈfuːlɪʃli/
in a way that is not smart or wise
He foolishly spent all his money on things he didn't need.
彼は愚かにも必要のないものにすべてのお金を使い果たした。