How to Say "erroneous" in Spanish
The Spanish word for “erroneous” is “erróneo” — B1 level.
Examples
Los datos que recibimos son erróneos.
The data we received are wrong.
Ella tomó una decisión errónea por falta de tiempo.
She made a mistaken decision because of a lack of time.
Es un concepto erróneo pensar que todos los gatos odian el agua.
It is a misconception (incorrect concept) to think that all cats hate water.
Matching the Noun
Like most adjectives in Spanish, this word must match the thing it describes. Use 'erróneo' for masculine things (un dato), 'errónea' for feminine (una idea), 'erróneos' for masculine plural, and 'erróneas' for feminine plural.
Where it goes
This word usually comes after the person or thing you are talking about. For example: 'una respuesta errónea' (a wrong answer).
Describing People
Mistake: “Yo soy erróneo.”
Correction: Estoy equivocado (if you made a mistake) or Soy una persona difícil (if you mean you have flaws). 'Erróneo' is almost always used for facts, data, or logic, not for describing a person's character.
Using 'Mal' as an Adjective
Mistake: “Esa respuesta está mal.”
Correction: While 'está mal' is common in casual speech, 'esa respuesta es errónea' is the more precise way to say the answer itself is incorrect.
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