“昏聩”常见的英文表达可以是 “befuddled; confused and incompetent; senile and confused” 等，具体可根据语境选择合适表述：
befuddled：侧重于表示因困惑、迷茫或头脑不清而导致的昏聩状态，强调一种思维上的混乱。例如：The old king was so befuddled that he made many wrong decisions.（老国王昏聩糊涂，做出了许多错误的决定 。）
confused and incompetent：更直白地描述出昏聩之人既头脑混乱又能力不足的特点。比如：The government official was so confused and incompetent that he couldn't handle the simplest tasks.（这位政府官员昏聩无能，连最简单的任务都处理不好。）
senile and confused：常用于形容因年老而出现的昏聩状态，突出年老体衰、精神不济导致的糊涂。例如：The senile and confused old man often forgot where he put his things.（这位昏聩的老人经常忘记自己把东西放在哪里了。 ）