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

Examples
La policía está investigando una serie de crímenes en el barrio.
The police are investigating a series of crimes in the neighborhood.
Los crímenes de guerra no deben quedar impunes.
War crimes must not go unpunished.
El informe detalla los crímenes financieros cometidos por la empresa.
The report details the financial crimes committed by the company.
Plural Form
This word is the plural form of the singular noun 'crimen'. Both the singular and plural forms are masculine, so you always use 'el' or 'un' before the singular, and 'los' or 'unos' before 'crímenes'.
Gender Agreement
When describing 'crímenes', remember to use masculine, plural adjectives. For example, 'crímenes graves' (serious crimes), not 'graves crímenas'.
Using the wrong gender
Mistake: “La crímenes son malos.”
Correction: Los crímenes son malos. ('Crímenes' is always masculine.)
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