Free Solo

In 2018, the popular documentary "Free Solo" chronicled one man's journey to scale the iconic El Capitan rock formation in Yosemite National Park without the benefit of ropes, restraints, or any safety equipment. The extraordinarily dangerous hobby of free soloing was a niche in the rock-climbing world long before, but it didn't make it into the dictionary until 2019.

Sanskrit equivalent

निःसुरक्षैकाकीशैलारोहणम्