The opposite of static in regard to motion or at rest is dynamic.

Here's why:

* Static refers to something that is not moving or changing. It implies a state of stillness or equilibrium.

* Dynamic refers to something that is moving, changing, or active. It implies motion, energy, and the potential for transformation.

Here are some examples:

* Static : A still photograph, a stationary object, a fixed position.

* Dynamic : A moving car, a flowing river, a changing weather pattern.

Therefore, dynamic is the opposite of static when discussing motion or rest.