Across
- 6. illness, disease
- 7. forum
- 8. biorhythm
- 9. early riser
- 10. peak achievement
- 11. lack
- 12. over-tiredness
- 13. accident
- 14. to be difficult
Down
- 1. to make someone's life hard
- 2. genetic
- 3. night owl
- 4. contribution
- 5. lightbulb
- 7. low achievement
- 10. mistake
