become of, happen, occur
Personne ne pouvait savoir avec certitude ce qui devait alors advenir.
No one could know for sure what would happen next.
Si cela devait advenir, que ferais-tu ?
If that were to happen, what would you do?
Peut importe ce qui pourrait advenir, je ne changerai jamais d'avis.
No matter what may happen, I will never change my mind.
Que va-t-il advenir de nos petits compagnons ?
What will become of our little companions?
Si, pour une raison quelconque, cela devait advenir, que ferais-tu ?
If, for some reason, that were to happen, what would you do?
Que va-t-il advenir de vos prisonniers ?
What will become of your prisoners?
Si, pour une raison quelconque, cela devait advenir, que feriez-vous ?
If, for some reason, that were to happen, what would you do?
What will become of me?
— L'Histoire personnelle de David Copperfield (2019)
Personne ne sait ce qu'il va advenir.
No one knows what will happen.