“课外词语”常见的英语表述有:“Extra-curricular s” 、“After-class s” 。
“extra-curricular”意思是“课外的;课程以外的”,例如:“Extra-curricular activities are very important for students' development.”(课外活动对学生的发展非常重要。)
“after-class”表示“课后的”,如:“We have many after-class tasks to do.”(我们有很多课后任务要做。)
所以用“Extra-curricular s” 或者“After-class s” 来表达“课外词语”都是比较准确和常见的。