dunce cap

US /ˈdʌns kæp/
UK /ˈdʌns kæp/
"dunce cap" picture
1.

bonnet d'âne

a conical hat, typically made of paper and inscribed with the word 'dunce', formerly worn as a punishment by children who had been slow to learn or misbehaved in school

:
In old cartoons, disobedient students were often made to wear a dunce cap.
Dans les vieux dessins animés, les élèves désobéissants devaient souvent porter un bonnet d'âne.
The teacher threatened to make him wear a dunce cap if he didn't pay attention.
Le professeur a menacé de lui faire porter un bonnet d'âne s'il ne faisait pas attention.