a person, especially a child at school, who is stupid or slow to learn 愚笨的人；（尤指）迟钝的学生 Oxford Collocations DictionaryDunce is used before these nouns:- cap
Word Originearly 16th cent.: originally an epithet for a follower of John Duns Scotus (c. 1265-1308), whose followers were ridiculed by 16th-cent. humanists and reformers as enemies of learning.