son estúpidas

are stupid

→ ser
phrase Rare #29,389
are stupid Used to describe feminine plural nouns or a group including feminine nouns.
SP: Tus ideas son estúpidas.
EN: Your ideas are stupid.

Tom piensa que las ideas de usted son estúpidas.

Tom thinks your ideas are stupid.

Son estúpidas de veras, ¿verdad?

They’re really stupid, aren’t they?

Las rubias no son estúpidas.

Blondes aren't stupid.

Las mujeres son estúpidas.

Women are stupid.

— Leviatán (2014)

Tom piensa que vuestras ideas son estúpidas.

Tom thinks your ideas are stupid.

Nadie quiere traducir sus frases porque son estúpidas.

Nobody wants to translate his sentences because they are stupid.

Algunas personas no llevan mascarilla porque son estúpidas e ignorantes.

Some people don't wear masks because they're stupid and ignorant.

Tom piensa que las ideas tuyas son estúpidas.

Tom thinks your ideas are stupid.

No todas las rubias son estúpidas.

Not all blondes are stupid.

Algunas personas no llevan careta porque son estúpidas e ignorantes.

Some people don’t wear face masks because they’re stupid and ignorant.