rappel

(noun) (mountaineering) a descent of a vertical cliff or wall made by using a doubled rope that is fixed to a higher point and wrapped around the body. Synonyms: abseil.

(verb) lower oneself with a rope coiled around the body from a mountainside. Synonyms: abseil, rope down. Examples: "The ascent was easy--roping down the mountain would be much more difficult and dangerous." "You have to learn how to abseil when you want to do technical climbing."