abseil
n//ˈæb.saɪl//nedfirning, fira
A descent in mountaineering using a rope looped at the top and a friction device. [First attested in the mid 20th century.]
(intransitive) To descend a steep or vertical drop using a rope with a mechanical friction device or (classic abseil) by wrapping the rope around the body; to rappel. [First attested in the mid 20th century.]