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Across 1. the nest of a bird built on a cliff 5. loud and persistent outcry 8. to reach about uncertainly 9. an open space 10. without someone's knowledge 14. eagle's claws 16. a disorderly commotion or disturbance 17. causing moral revulsion 18. vapour or steam 19. various sour-juiced plants

Down 2. leaves of a fern 3. a tall fern with coarse lobed fronds 4. to take a risk 6. unsettling 7. an aromatic plant of the mint family 8. dizzy 11. intellectual or moral ignorance 12. a high pointed piece of rock 13. clumsy 15. to strike down