declivitous
dec·li·vi·tous
adjective
1.
Origin
Latin declivus (“sloping down”), from de- (“down from”) + clivus (“slope”).
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.