precipice

Precipice is a noun referring to a very steep or overhanging cliff or rock face, typically with a near-vertical drop. The term is used in geology, geography, mountaineering, and everyday language to denote a dangerous edge where a fall can occur. The word derives from Latin praecipitium meaning "abyss" or "steep fall," via Old French precipice.

Precipitous faces commonly form where waves undercut coastal rock, along mountain fronts exposed to uplift and faulting, and in canyons where differential erosion concentrates vertical walls. They can also arise from glacial erosion and rock fracturing that produce sheer faces. Heights vary widely, from tens of meters to hundreds or more in high terrain.

Hazards include the risk of falling, rockfalls, and sudden changes in weather or light that can obscure the edge. Safety practices in the field emphasize staying well back from the edge, wearing appropriate footwear, and using ropes or anchors in technical routes when necessary.

Metaphorically, the term is used to describe a critical point at which a sudden change or disastrous outcome is possible, as in "on the precipice of disaster." In landform terminology, precipice emphasizes the abruptness and danger of the drop, distinguishing it from less steep cliff faces and other escarpments.