sempiternity (noun)

1. Their love seemed to be in a state of sempiternity, neither of them could imagine a life without the other.

2. The Egyptian civilization, with its ancient temples and pyramids, is a spectacular representation of sempiternity.

3. The movie explored the concept of sempiternity by depicting a character who was trapped in a time loop, reliving the same day over and over again.

4. The haunted house had an eerie atmosphere of sempiternity, with ghostly figures that appeared to be trapped in a perpetual state of torment.