unaltered
It's wrong for lawyers to take a fixed and unalterable position, regardless of changing circumstances.
His books present changing perceptions rather than unalterable truths.
These are unalterable programs that govern the computer's standard operations.
Print copies of the newspaper are an unalterable historical record.
England were better in the second half but by then the direction of the match was unalterable.

SMART Vocabulary: related words and phrases

Not able to be changed
be no hard and fast rulesidiom
burn your boats/bridgesidiom
congenital
continuity
deep-seated
incorrigible
incurably
inelastic
inelasticity
inflexible
irreversible
irreversibly
irrevocable
irrevocably
leopard
sb's way or the highwayidiom
unchangeable
uncompromising
uncompromisingly
unredeemable