adj.愚蠢的；荒谬的；可笑的
It's foolish to idle away one's precious time. 把大好时光浪费掉是愚蠢的。
He could not account for his foolish mistake. 他无法解释他所犯的荒谬的错误。
If fifty million people say a foolish thing, it is still a foolish thing. 假使五千万人讲出一件荒谬的事，那仍然是荒谬的事。
foolish是具有评价意义的形容词,指人时强调智力低下,缺乏常识和判断力,即“愚蠢的,笨的”; 指行为时表示不动脑筋缺乏考虑的愚蠢举动,即“笨拙的,傻瓜似的”。
foolish在句中可用作定语或表语。
foolish后接动词不定式时,该不定式的逻辑主体须用of(而非for)引出。
adv.愚蠢地
n.可笑；愚蠢
