is stupid
Creo que Tomás es estúpido.
I think Tomás is stupid.
Do you think he's stupid?
Es estúpido pasear con este tiempo.
It’s stupid to go for a walk in this weather.
Es estúpido buscar algo que ni siquiera sabes si existe.
It's stupid to look for something you don't even know exists.
— El jardín de los pecadores 5: Paradoja espiral (2008)
He is stupid and arrogant.
My brother is stupid.
Tal vez Tom es estúpido.
Maybe Tom is stupid.
Do you think he's stupid?
Es estúpido de su parte comportarse de esa manera.
It's stupid of him to behave that way.