noun
permanence
PUR-muh-nuns/ˈpɜːrmənəns/
The quality of lasting indefinitely or remaining unchanged.
The old stone bridge stands as a symbol of permanence.

Etymology
The pieces convey staying through to the end. Permanence names the resulting quality of continued existence in the same condition or place, extending to indefinite endurance without major change.
In context
I've been trying to figure out how to bring it up without sounding like I was trying to manufacture permanence out of a temporary arrangement.
More examples
- Buying a home gives them a sense of permanence.
- Artists value this ink for its permanence.
- The contract does not guarantee the permanence of her position.
Forms
permanence
permanent adjective — Lasting indefinitely or remaining essentially unchanged.
permanently adverb — In a way that lasts indefinitely.
Similar words
- durability
- Emphasizes resistance to wear or damage, rather than endless duration.
- stability
- Emphasizes steadiness or resistance to change, not necessarily lasting forever.
- longevity
- Emphasizes a long life or duration, rather than indefinite existence.