incoercible

Difficult or impossible to coerce or control forcibly.

In physical:

Incapable of reduction to tangible condition by pressure: applied to forms of energy, such as heat and electricity, when they were thought of as extremely subtile fluids.

Not to be coerced or compelled; incapable of being constrained or forced.

In physics, incapable of being reduced to a liquid form by any amount of pressure. Certain gases were formerly supposed to have this property. See gas.

Not to be coerced; incapable of being compelled or forced.

Not capable of being reduced to the form of a liquid by pressure; — said of any gas above its critical temperature.

That can note be confined in, or excluded from, vessels, like ordinary fluids, gases, etc.; — said of the imponderable fluids, heat, light, electricity, etc.

Not to be coerced; incapable of being compelled or forced.

Not capable of being reduced to liquid form by pressure.