How to Say "inattention" in Spanish
The Spanish word for “inattention” is “distracción” — A2 level. This is a very common word in everyday Spanish.

Examples
Por una distracción, escribí mi nombre mal en el formulario.
Due to a distraction (lapse of concentration), I wrote my name wrong on the form.
El ruido constante de la calle es una gran distracción para mí.
The constant street noise is a big distraction for me.
Necesito silencio total para evitar cualquier distracción.
I need total silence to avoid any distraction.
Gender Alert
Remember that 'distracción' is a feminine noun, so you must use 'la' before it, and any describing words (adjectives) must also end in '-a', like 'una gran distracción'.
Mixing up the Noun and Verb
Mistake: “Usar 'distraer' (the verb) when you mean 'distracción' (the noun).”
Correction: The event itself is the noun: 'Fue una distracción' (It was a distraction). The action of doing it is the verb: 'Me voy a distraer' (I am going to distract myself).
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