Only gradually did his human form return, in a process of nearly unendurable pain.

I know, it's pain, unendurable pain to realize that such a trick could be done.

But he added, "I'm not creating something just to have buzz for a month, then to have four months of unendurable pain."

And that meant unbelievable, unendurable pain coming up ahead.

It was unendurable pain, and only hate could protect him from it.

His last clear memory was of unendurable pain in that same place.

"And with every finger that is removed, there will be more unendurable pain."

Despite the unendurable pain, his first duty was to his partner.

Her face spasmed with unendurable pain and she let out a frightening squall.