declivitous

• But four miles inland the bed becomes rugged and declivitous, and the mountain walls close in, forming a most magnificent canon from 1,000 to 2,500 feet deep. —  The Hawaiian Archipelago
• High declivitous, masses of rock formed a sort of immense cairn. —  Dave Dashaway and His Hydroplane
• A path declivitous, with baleful yew —  The Metamorphoses of Publius Ovidus Naso in English blank verse Vols. I & II
• Rapid 'twixt banks declivitous, they seek —  The Metamorphoses of Publius Ovidus Naso in English blank verse Vols. I & II
• Mrs. Daniel Pray, who was almost a giantess and bent laboriously over to accommodate her height to her husband's, took off her glasses and laid them on her declivitous lap, the better to fix —  Country Neighbors

Allen's Synonyms and Antonyms