precipitous

这条路沿着陡峭的山崖蜿蜒而上，开车要格外小心。

The road winds along the ___precipitous mountain cliff, requiring extra caution while driving.

他匆忙的决定导致了一个糟糕的结果。

His ___precipitous decision led to a terrible outcome.

公司营收的急剧下滑令投资者感到警觉。

The company's ___precipitous decline in revenue alarmed its investors.