exist

verb:to have objective reality or being; to be real
- Do you believe that ghosts exist?
verb:to have life or the state of living; to be alive
- Dinosaurs existed for millions of years before becoming extinct.
verb:to be present or found in a particular place or situation
- A solution to this problem does not yet exist.
verb:to live, especially under difficult conditions or with minimal resources
- The refugees had to exist on very little food and water.