* MEANING *

 1. alternated : changing places

 2. Sloping : slanting up or down

 3. Summit : the highest point of a hill or mountain

 4. ridge : a long narrow piece of raised land 

 5. Accord : agreement, be harmonious or consistent with

 6. Quench : satisfy one's thirst 

 7. Exhilarated : very happy and excited

 8. Gale : strong wind 

 9. Foliage : the leaves of a tree or a plant

10. rattled : talk rapidly and at length

11. Lamented : a passionate expression of grief

12. Elusive: difficult to find catch or achieve

13. rendered : contributed, made available

14. peril : danger , risk

15. triennial : the 300th aniversary