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

Examples
La traición de su socio comercial arruinó la empresa.
His business partner's betrayal ruined the company.
Para muchos, vender secretos de estado es el peor acto de traición.
For many, selling state secrets is the worst act of treason.
Sentí una profunda traición cuando descubrí que me había mentido.
I felt a deep betrayal when I discovered he had lied to me.
Feminine Noun Rule
Remember that 'traición' is always a feminine word, so you must use feminine articles and adjectives with it (e.g., 'la traición', 'una traición terrible').
Using 'A' with Betrayal
When talking about who or what was betrayed, Spanish often uses the preposition 'a' (to/against): 'traición a la confianza' (betrayal of trust).
Gender Error
Mistake: “El traición”
Correction: La traición. Even though the word doesn't end in 'a', it is feminine.
Related Translations
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