How to Use "existential" with Example Sentences

1. Our aim is not to answer these existential questions .
2. The crisis has onlyincreased the urgency of some existential questions .
3. Questions closely related to the nature of myth are the existential " what is truth ? "
4. It is dangerous , not least , because the so-called new autocracies pose no existential threat and offer no compelling new ideology .
5. Iran is seen as an existential threat , and that has raised speculation that israel might launch a pre-emptive strike on iranian nuclear facilities .