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11. force to leave or move out

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12. any of the 12 pairs of curved arches of bone extending from the spine to or toward the sternum in humans (and similar bones in most vertebrates)

13. a condition caused by blocking the airways to the lungs (as with food or swelling of the larynx)

14. a sudden unforeseen crisis (usually involving danger) that requires immediate action

15. an emergency procedure to help someone who is choking because food is lodged in the trachea

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