His first thought would have been that while he was asleep, some terrible and irredeemable calamity had happened.

I was certain that if I tried to use it, some terrible calamity would occur.

But, what seems to you at first a terrible calamity is really a blessing in disguise.

God forbid there was a terrible calamity, we could just open the gates.

They knew that some terrible calamity must have occurred.

"Surely some terrible calamity has occurred somewhere where emergency donations are needed."

He wondered why such a terrible calamity had happened to her.

It would be the most terrible calamity if he were to be killed not knowing!

Father and son were both convinced that some terrible calamity is going to wipe mankind off the face of the planet.

A terrible calamity has befallen him, and I can't speak of these things.