Think of a powerful spring, wound very tight and small, thus storing much energy.

She gave the names to the most powerful and impressive hot springs there.

Fly-tying books all contain a powerful spring in the binding.

The dog followed him in one powerful spring and barked.

The English changed the design to allow for a more powerful spring and larger ammunition.

His body went upward as though impelled by a powerful spring beneath.

In a powerful spring, the creature passed over his head.

She felt him gather himself like a beast on the powerful springs of its limbs.

However, he found a powerful spring of water near Prusac.

Each arm had a spring too powerful for Peter's muscles.