Definition

foolish: ridiculous, silly; not clever, unintelligent adjective
foolishly: stupidly, unintelligently, unadvisedly adverb

UK: You're a very foolish man. Do be quiet.
US: It was foolish of me to think I could fly.
  • "She foolishly tried to steal my best client, so I shot her in the back of the head with a paintball gun."
  • "We were young and foolish when we first started the business in San Francisco."
  • "I believe we should look into changing banks as soon as possible: staying with our current bank seems to be a foolish expenditure."

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