What does «irreductible» mean in Spanish?

Irreducible; that cannot be reduced.

Examples of use in Spanish: "de tamaño irreductible".
That cannot be subdued, conquered or persuaded.

Examples of use in Spanish: "la irreductible guerrilla ofrecía gran resistencia".

"de carácter irreductible".

"el espíritu irreductible de sus gentes".

"la igualdad es un valor fundamental, un principio ético irreductible".
That there is no conciliation possible.

Examples of use in Spanish: "las dos facciones son irreductibles, no se pondrán de acuerdo".
It is said of some dislocations, fractures, hernias, which can not be taken to the place of before or can not be reduced.