unrecoverable (adjective)

1. In the comic book series, the hero's superpower was the ability to restore life to objects, but even he couldn't bring back the unrecoverable souls of the deceased.

2. The tragic anime depicted the devastating aftermath of a natural disaster, showing the unrecoverable loss of homes and loved ones.

3. The fire destroyed the historical building, leaving only ashes and an unrecoverable piece of architectural heritage.

4. The protagonist in the novel suffered a great personal loss, experiencing an unrecoverable emotional breakdown that changed the course of the story.