perilous

The country's mountainous topography can also make driving conditions perilous.

At the same time, other perilous crosscurrents in the economy had Wall Street on edge.

Both had volunteered for the perilous job of scouting for the Allies, observing and reporting on the movement of Japanese forces.

Traffic lights no longer work, causing perilous intersections.

He says he knows from experience the perilous nature of racing, with jockeys balanced over a saddle the size of a large handkerchief and horses bunched together running up to 40 miles an hour.