What a Proposal!

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Across
  1. 3. to meet as an adversary or enemy
  2. 5. fundamental element, principle or skill
  3. 6. something, especially food, that sustains life or health
  4. 7. to take advantage of someone
  5. 10. to express agreement or acceptance of of a proposal
  6. 12. something that is found everywhere
  7. 14. a desease, disorder or ailment
  8. 15. coinciding or accompanying
  9. 16. someone in a lower position than you
  10. 18. not discouraged or disheartened; resolutely courageous
Down
  1. 1. conscientious and exact, having scruples
  2. 2. an incentive
  3. 4. a burden or impediment
  4. 8. to never give up on something
  5. 9. a short account of an interesting or funny incident
  6. 11. a polite expression of greeting or goodwill
  7. 13. enormous
  8. 17. to explain in detail