Where NOTHING dies? That's going to make meal prep super awkward.

The same way you do to a child. They go away and can never come back

"Like a leaf caught aflame, it's matter converted to heat and the bonds broken down to ash. It's not gone, it's structure has changed to the point of no longer being 'a leaf', and what we see before us when looking at someone/something who has passed on is the same as ashes in the fire. Changed, but jot truly gone"

You describe birth, youth, parental love, new beginnings, etc. first, because those things could not exist without death.

I'm having trouble imagining a real universe "where nothing ever dies". What counts as a thing? What counts as dying? If nothing ever changes then nothing dies, but if nothing changes then I can't explain anything at all to this person.

Alternately, they're from a toy universe, like a game with no death condition, but even those depend on outside things to continue existing. Eventually the game stops and everything in the universe "dies", but otherwise there's nothing in their world that ever dies. Maybe that's close enough.

Anyway:

"You know how right now I'm talking, but eventually I'm going to stop? Imagine being like that."

Just pining for the Fjords

That pile of dirt is going to walk and talk around for a while. And then it's going back to being an insert pile of dirt.

You know how right now, things are happening in other places that you'll never be a part of or know about, because you can only be in one? It's like that but with times.

It gets across the concept of nonexistence, although that might leave confusion about if you live only once or multiple times. If they're still born at some point, I could say it's like that but the opposite.

Leaving and never coming back ever

The entity you knew as yaddayadda is gone and the only thing left behind is an empty, decaying shell and the memories we have of them in our minds.

Ceasing of all functions

You go to sleep and you never wake up.

Kill something Infront of them

You know when someone isn’t around and you can’t see them? Well imagine that someone were in a place where no one in the world could see them. The person in this separate place is sleeping but does not dream.

at a random time you cease to exist just because

We can't even explain death to ourselves.

All biological functions of an organism stops.

Now what happens to the mental and cognitive functions is unknown.

https://www.youtube.com/watch?v=peOFMz4ca6c

without death there is no end and without end there is no real beginning either since the word doesnt even have meaning at that point. And without end there is also no change, because changing enough would be also kind of an ending and also "dying" as one version of you stops and another begins. Could such being even be sentient enough to understand you? Would it want to be?

You reading Project Hail Mary? And Ryland is talking to the Eridians?