A system used to descend heights with a rope(noun)
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Use "rappelling" in a sentence
"DEAR AMY: I am having a running disagreement with my 24-year-old daughter about gratuitous risk taking, such as rappelling and skydiving."
"The cadets were tested mentally and physically in various exercises and challenges designed to test their physical and mental endurance such as rappelling, land navigation, leadership course, rafting, water survival and other events."
"In addition to the main segments, the organizers throw in extra challenges, such as rappelling, swimming"