How to Say "betrayal" in Spanish
The most common Spanish word for “betrayal” is “traición” — use 'traición' for any act of disloyalty, breaking of trust, or treason, such as in business, politics, or personal relationships (excluding romantic infidelity)..
traición
Examples
La traición de su socio comercial arruinó la empresa.
His business partner's betrayal ruined the company.
cuerno
/KWER-noh//ˈkweɾno/

Examples
Ella le puso los cuernos con un compañero de trabajo.
She cheated on him with a coworker.
The Verb 'Poner'
In this context, we always use the verb 'poner' (to put) to describe the act of cheating.
Careful with this word!
Mistake: “Telling someone they 'have horns' (tienes cuernos).”
Correction: This is a major insult in many Spanish-speaking cultures. Only use it if you are prepared for a very angry reaction!
Relationship vs. General Betrayal
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