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

Examples
Necesito un informe detallado sobre las ventas.
I need a detailed report on sales.
Ella hizo un dibujo muy detallado de la catedral.
She made a very detailed drawing of the cathedral.
El plan es tan detallado que no hay margen de error.
The plan is so thorough that there is no room for error.
Gender and Number Agreement
Remember that this word must match the person or thing it describes. If you are describing a feminine word like 'explicación,' change it to 'detallada.' For plurals, use 'detallados' or 'detalladas.'
Position After the Noun
In Spanish, describing words usually come after the thing they describe. So, you would say 'un mapa detallado' (a map detailed) rather than 'un detallado mapa.'
Confusing 'Detalle' with 'Detallado'
Mistake: “Este libro tiene mucho detallado.”
Correction: Este libro tiene muchos detalles o es muy detallado. Use 'detalle' for the noun (a detail) and 'detallado' for the description (detailed).
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