Skids' force field blocks their attacks but they simply wait until pure exhaustion drops her.

It was just pure physical exhaustion and then collapse.

They heard only their own terror, and like mechanical toys, they had to run down from pure exhaustion.

Elizabet leaned back against the couch with a sigh of pure exhaustion.

As he swims, he gets delirious from pure physical exhaustion.

He tried to rise once more, defeated by a giddy rush that might have been produced by chemicals or pure exhaustion.

Now and again one stumbled from pure exhaustion.

He paused in his blind struggle, gasping from pure exhaustion.

But he finally gave up, out of what he describes as "pure exhaustion, wear and tear."

Gun horses fell in the traces and died of pure exhaustion.