Travellers to that region allude to unimaginable horrors, but few actually return to speak of it.

At any moment he had expected the tent to tear open, and some unimaginable horror to come rushing in upon them.

But Forwards was far away, through lands of unimaginable horror.

He mused philosophically, "The modern world is full of unimaginable horrors."

Will we find, on some distant, frozen planet, an alien life of unimaginable horror?

It seemed certain Hilda had arranged to poison the food, but she closed her mind to that unimaginable horror.

What was marked yesterday is a televised shocking example of people coping with unimaginable horror.

I feel that we are already in that room, with rats and unimaginable horrors attacking us.

You survived a childhood of utter terror and unimaginable horror.

If what we are doing is taken over by the unscrupulous it can cause unimaginable horror and suffering.