irreplaceable

too valuable or special to be replaced ไม่สามารถแทนที่กันได้

The process of restoring flood-damaged books is expensive, so the book owner should focus on irreplaceable ones.

When it comes to irreplaceable assets, how much are you willing to pay to insure them?

Every single flood victim will tell you that certain belongings are irreplaceable, whether because of their unique nature or sentimental value.