abseil(n = noun.act) rappel - (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;
abseil(v = verb.motion) rappel, rope down - lower oneself with a rope coiled around the body from a mountainside; "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"
abseil, v. & n. Mountaineering
--v.intr. descend a steep rock-face by using a doubled rope coiled round the body and fixed at a higher point.
--n. a descent made by abseiling.