She felt a soft flannel lining appear inside the material and knew her energy was waning if she couldn't manage any better than that.

And just as the crowd's energy never waned, simply because there was always something worth cheering, neither did the players decompress.

But his energy and enthusiasm for the film business never waned.

His energy, ambition and narcissism have not waned, and we are sure to hear from him again.

His energy and enthusiasm for his work have not waned.

He thereby seemed to be someone whose energies were constantly waning.

But the most draining pain was knowing that his physical energy had waned.

My energy was waning with the light.

As the night wore on, Jeffrey's energy waned.

The drink was telling; he felt his energy wane.