become speechless

One of the only surviving members, an orphaned child, has become speechless with shock.

"In the Odebrecht case, there are many reasons for you to become speechless," says Deltan Dallagnol, lead prosecutor in Curitiba.

I said ‘is that so?’ and I become speechless.

People talking of that time can become speechless with the pain of it.

Some versions of the VEI become speechless at that point; others scale up to “huge,” “humongous” and “indescribable.”