laisser ça arriver

let that happen

→ laisser
phrase Rare #32,964
let that happen Used to express allowing or failing to prevent something from happening. Ça can be replaced by cela, which is more formal.
FR: Je ne vais pas laisser ça arriver.
EN: I'm not going to let that happen.

Comment as-tu pu laisser ça arriver?

How could you let that happen?

Je ne pourrais simplement pas laisser ça arriver.

I simply couldn't let that happen.

Je ne pouvais simplement pas laisser ça arriver.

I simply couldn't let that happen.

Pourquoi laisser ça arriver!?

Why let this happen?!

— Suzume (2022)

Comment j'ai pu laisser ça arriver?

How could I have let this happen?

Comment tu as pu laisser ça arriver?

How could you let that happen?