A very steep cliff.

Roget 212: verticality; erectness etc. adj.; perpendicularity etc. 216.1; right angle, normal; azimuth circle.    wall, precipice, cliff.    elevation, erection; square, plumb line, plummet.    ... show more

Roget 667: rocks, reefs, coral reef, sunken rocks, snags; sands, quicksands; syrt^†, syrtis^†; Goodwin sands, sandy foundation; slippery ground; breakers, shoals, shallows, bank, shelf, flat, lee shore, ironbound coast; rock ahead, breakers ahead.    precipice; maelstrom, volcano; ambush etc. 530; pitfall, trapdoor; trap etc. (snare) 545.    sword of Damocles; wolf at the door, snake in the grass, death in the pot; latency etc. 526.    ugly customer, dangerous person, le chat qui dort [Fr.]; firebrand, hornet's nest.    ... show more

Dutch: afgrond
Polish: uskok, urwisko