using a rope, it is called abseiling or rappeling.
To abseil means to descend a cliff, rock, mountain face or other vertical surface by means of a double rope anchored above oneself.
She would descend down the stairs at midnight.
I descend down the stairs.
it's called a mudslide. XD
repel
It's called a landslide
Climbers usually descend from the summit of Mount Everest by the same route they took up.
Prussicking is where you ascend or descend a rope using (prussick) loops as slings for your body and each foot. The loops are attached to the vertical rope with a special knot that allows them to be slid up/down when no weight is on the loop.
descend
it means down
To descend, to come down.
A sheer cliff is a vertical or nearly vertical rock face or wall that has very little or no slope. It typically has a steep and abrupt drop-off, making it difficult or impossible to ascend or descend without specialized equipment or climbing skills. Sheer cliffs can be found in mountainous areas, coastal cliffs, or canyons.