Origin: Latin suffix -al
Betrayal has 3 different meanings across 1 category:
the quality of aiding an enemy
"When he secretly passed our battle plans to the opposing forces, his act was a profound betrayal that aided their victory."
the act of betraying
"His sudden support for our rival team felt like a deep betrayal after years of loyalty."
The word betrayal comes from the verb betray combined with the suffix -al. It originally referred to the act or process of betraying someone.