英汉词典

1. (举止或行为)愚蠢的，傻的，笨的
    If someone's behaviour or action is foolish, it is not sensible and shows a lack of good judgment.

    e.g. It would be foolish to raise hopes unnecessarily...
           无谓地燃起人们的希望是愚蠢的。
    e.g. It is foolish to risk skin cancer.
           冒患上皮肤癌的风险是愚蠢的。