stupid
US /ˈstuː.pɪd/
UK /ˈstuː.pɪd/

1.
stupide, idiot
having or showing a great lack of intelligence or common sense
:
•
That was a really stupid mistake.
C'était une erreur vraiment stupide.
•
Don't be stupid, that's not how it works.
Ne sois pas stupide, ce n'est pas comme ça que ça marche.