How to Say "confessed" in Spanish
The Spanish word for “confessed” is “confesó” — B1 level. This is a very common word in everyday Spanish.

Examples
Él confesó que se había comido el último trozo de pastel.
He confessed that he had eaten the last piece of cake.
Después de horas, el sospechoso confesó su crimen.
After hours, the suspect confessed to his crime.
Ella confesó sus sentimientos por su mejor amigo.
She admitted her feelings for her best friend.
The Importance of the Accent Mark
The accent on the 'ó' tells you that the action happened in the past and that 'he', 'she', or 'you (formal)' did it. Without the accent, it doesn't exist as a common word in this form.
Past Tense Usage
This word is the 'Preterite' form, which we use for actions that were completed at a specific point in time.
Confusing 'Confesó' with 'Confieso'
Mistake: “Using 'confesó' to say 'I confess'.”
Correction: Say 'yo confieso' for the present and 'él confesó' for the past. The accent and the spelling change the person and the time.
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