declivitous

adjective2

1. •
   Descending gradually; sloping; downhill.

   • Where the ground is declivitous, it is requisite that the hole should be deeper, in addition to which it should be artificially elevated on the edge of the lower side. — 1855
2. •
   At lower levels; lowly.

   • I, for one, and certainly Aera, do not feel declivitous. — 2011