unalterable

The characters inhabit a patriarchal, unalterably hierarchal society, where class—and the chasms it creates—is front and center.

My brother's affections were now unalterably fixed upon Louisa, but a sentiment of delicacy and generosity still kept him silent.

And those three million policemen, armed with lethal and legal weapons, are inflexibly and unalterably for no change.

These Socialists are unalterably opposed to our whole industrial system.