refractory

Showing or characterized by obstinate resistance to authority or control.

Difficult to melt or work; resistant to heat.

Resistant to treatment.

One that is refractory, especially a material that has a high melting point.

Resisting; unyielding; sullen or perverse in opposition or disobedience; obstinate in non-compliance; stubborn and unmanageable.

Resisting ordinary treatment or strains, etc.; difficult of fusion, reduction, or the like: said especially of metals and the like that require an extraordinary degree of heat to fuse them, or that do not yield readily to the hammer.

Not susceptible; not subject; resisting (some influence, as of disease).

Synonyms Stubborn, Intractable, etc. (see obstinate), unruly, ungovernable, unmanageable, headstrong, mulish.

One who is obstinate in opposition or disobedience.

Obstinate opposition.