I stayed with him until the warmth left his body and my nerve broke.

He moved forward over the crevasse before his nerve broke.

She made it outside just before her own nerve broke.

Now, caught in the open, her nerve almost broke.

And even as he thought the words, he realized that his nerve was breaking.

Certainly broke her nerve for that kind of work.

He knew he had to do this rapidly or his nerve would break.

His nerve broke and he simply made a bolt for it.

When he was a couple of paces away, the horse's nerve broke.

Her nerve would break and she would give herself away.