Across
- 2. show, represent
- 5. endless, persistent
- 9. mystery, puzzle
- 10. worsening, decline, weakening
- 12. able to continue for a long time
- 13. vital, very important
- 15. plan
- 16. peak of your success, glory days
Down
- 1. contradictory
- 3. balancing
- 4. undesirable, unwelcome
- 6. existing everywhere
- 7. the state of being able to read and write
- 8. suggest
- 11. stop, prevent
- 14. ensure, make certain