(1)呆笨的，愚蠢的(slow to understand or learn things;dull)：a～person 愚蠢的人;He isn't as～as he looks. 他没有看上去那么傻。A～class is difficult to teach. 一个学生反应迟钝的班是很难教的。〖同〗dull，dumb，unintelligent，simpleminded，slow-learning;

(2)缺乏判断力的，愚蠢的(indicating lack of good judgement;foolish)：a～idea/plan/solution 愚蠢的念头/计划/解决办法;Don't make～mistakes. 别犯愚蠢的错误。The general made a～decision. 将军做了个愚蠢的决定。The boy's～behaviour got him into trouble. 那个男孩愚蠢的行为给他惹了麻烦。What a～place to put it in! 把它放在那儿是多么不合适呀! It was～of you to turn it upside down without closing the lid. 你没有盖上盖就把它翻过来真是太蠢了。I think it is a～way of killing time. 我认为这是消磨时间的愚蠢方式。〖同〗foolish，unwise，ill-considered，ill-judged，silly;

(3)(用于表示轻视或恼怒)(used dismissively or to show irritation)[作attrib](infml)：This～truck won't start. 这倒霉的卡车发动不起来。 This～drawer won't open. 这破抽屉打不开。

(4)感觉迟钝的，神情恍惚的(in a state in which one cannot think or use the senses)[通常作pred][A(with)](fml)：be～with sleep/tiredness 睡/累得昏昏沉沉的;He was (feeling)～from lack of sleep. 缺乏睡眠使他神情恍惚。

→stu′pidity n 愚蠢;糊涂;愚蠢的行动;傻话;′stupidly adv 愚蠢地;

【辨异】stupid与foolish和silly的区别见FOOLISH。