Permanent
Definition 1 of 3

Unchanging Nature
Use 'permanent' when something won't change at all.

Tattoos are considered permanent, choose wisely.
Future Assurance
'Permanent' often implies no end, used for certainty about future.

They installed a permanent exhibit at the museum.
Emotional Weight
'Permanent' can convey the seriousness of a situation or decision.

Leaving her family was a permanent choice, laden with sadness.
Compare with
constantendurefixirreversiblelastpersistentstableunchanging
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