How to Say "stupidity" in Spanish
The most common Spanish word for “stupidity” is “estupidez” — use this word to describe the general quality or state of being foolish or unintelligent.
estupidez
es-too-pee-DESestuˈpiðeθ

Examples
No puedo creer la estupidez que dijo en la reunión.
I can't believe the stupid thing (or foolish remark) he said in the meeting.
La estupidez humana a veces me sorprende.
Human stupidity sometimes surprises me.
Cometimos una estupidez al salir sin paraguas.
We committed a foolish act by leaving without an umbrella.
Gender Rule for -ez
Most Spanish nouns that end in -ez are feminine, like 'estupidez' and 'rapidez' (speed). Always use 'la' or 'una' with them.
Using the wrong gender
Mistake: “El estupidez”
Correction: La estupidez. Remember that this noun is feminine, so use the article 'la'.
tontería
Examples
¡Deja de decir tonterías y escúchame!
Stop talking nonsense and listen to me!
idiotez
ee-dee-oh-tessi.ðjoˈteθ

Examples
¡Qué idiotez acabo de hacer!
What a stupid thing I just did!
No perdamos el tiempo con esa idiotez.
Let's not waste time with that nonsense.
Me da rabia haber fallado por una idiotez.
It makes me angry to have failed because of something so stupid.
Spelling Change in Plural
When you have more than one 'idiotez,' the 'z' at the end changes to a 'c' before adding '-es'. So, it becomes 'idioteces'.
Using 'Una' for Actions
In Spanish, we often say 'una idiotez' (a stupidity) to refer to a single specific action or remark, whereas in English we'd more likely say 'a stupid thing'.
Person vs. Action
Mistake: “Eres una idiotez.”
Correction: Eres un idiota.
barbaridad
bar-bah-ree-DAHDbaɾβaɾiˈðað

Examples
¡Qué barbaridad estás diciendo!
What nonsense are you talking!
Es una barbaridad que cierren el hospital.
It's outrageous that they are closing the hospital.
Cometió una barbaridad al dejar su trabajo sin tener otro.
He did something crazy by quitting his job without having another one.
The 'Exclamation' Pattern
Use '¡Qué barbarity!' on its own to react to almost anything shocking—good or bad.
Not just for 'bad' things
Mistake: “Thinking it only means 'cruelty'.”
Correction: Use it for anything excessive or silly.
Choosing Between 'Estupidez' and 'Tontería'
Related Translations
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