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English definition of “foolish”

foolish

adjective  /ˈfu·lɪʃ/ us  
stupid or unwise: She was afraid that she would look foolish if she refused to go along with her friends. It would be foolish of us to assume that everything will work out fine.
foolishly
adverb  /ˈfu·lɪʃ·li/ us  
I would just like to know that my taxes are not being foolishly spent.
foolishness
noun [U]  /ˈfu·lɪʃ·nəs/ us  
My father was not one to tolerate foolishness.
(Definition of foolish from the Cambridge Academic Content Dictionary © Cambridge University Press)
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