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

Examples
Hice una anotación rápida en mi cuaderno para no olvidar la cita.
I made a quick note in my notebook so I wouldn't forget the appointment.
El libro tiene muchas anotaciones en los márgenes.
The book has many notes in the margins.
Revisa tus anotaciones de la clase de ayer.
Check your notes from yesterday's class.
The -ción Rule
Words that end in '-ción' are almost always feminine. Use 'la' or 'una' with this word.
Losing the Accent
When you make this word plural ('anotaciones'), you remove the written accent mark on the 'o' because the natural stress moves to a different part of the word.
Musical Notes
Mistake: “Escribí una anotación musical.”
Correction: Escribí una nota musical.
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