declivitous

But I plodded on and on, finding all things looking beautiful in that autumn glow, until at last I found myself descending the declivitous road into Wretchedville and to destruction.

They were standing on the rocks, which formed a declivitous wall beneath their feet.

Its chasms resemble the declivitous shores of the sea; the wind often fills them with snow; the paths are almost impracticable, the descent is so rapid and slippery.” 

We hesitated for some time whether we should undergo the fatigue of travelling over such declivitous mountains without any palpable reward.

It was immediately drawn tight, and by its aid we gained the bank, and began ascending the side of the barranca, composed of rugged, declivitous rocks, affording but scanty foot-hold.