adjective

precipitous

prih-SIP-ih-tus/prɪˈsɪpɪtəs/

So steep that it suggests a sudden drop.

A narrow trail winds along the edge of a precipitous cliff.

Very steep sheer cliff drops abruptly from narrow rocky path into white depth, side view reveals dangerous near-vertical face, a tiny low shrub for scale, no people falling.
Etymology

From French precipiteux, the adjective initially described rash haste or headlong movement. Its later application to high, steep terrain links the image of a headlong plunge with both steepness and dangerous suddenness.

In context

Enhanced Public Domain185:38
the ascent is precipitous but the path path is cut into continual and short windings which enable you to surmount the perpendicularity of the mountain
1800s Fiction Audiobook: Mary Shelley - Frankenstein

More examples

  • The hikers avoid the precipitous slope above the river.
  • The road zigzags down a precipitous mountainside.
  • A sturdy railing guards the precipitous drop behind the house.

Forms

precipitous

precipitously adverb — At a very steep downward angle.

Similar words

steep
Describes a sharp incline without suggesting a sheer drop.
sheer
Means almost vertical, rather than merely very steep.