The word "rapel" originates from the French language. It is a borrowing from the French verb "rappeler", which means "to recall" or "to call back". The term then developed a specific meaning in the context of mountaineering and rock climbing, where it refers to a technique of descending steep slopes or cliffs using ropes. This technique involves rappelling down the rope, which allows climbers to safely descend vertical or near-vertical surfaces. Over time, "rapel" has been adopted into several other languages, including English, as a noun and verb to describe this specific mountaineering technique.