failed, let down
Si no hubieras tenido mi consejo, habrías fallado.
If you hadn't had my advice, you would have failed.
They must have failed.
Tenía miedo de que hubieras fallado.
I was afraid you had failed.
La ciencia, por boca de su oráculo don Juan de Vega, había fallado.
Science, speaking through its oracle, Don Juan de Vega, had failed.
¿Cómo lo convenciste de que tú podrías tener éxito dónde él había fallado?
How did you convince him that you could succeed where he had failed?
— Héroe (2002)