acclīvĭtas

ātis, f.

acclivis

I. an ascending direction, an acclivity, ascent: pari acclivitate collis, Caes. B. G. 2, 18; so Col. 2, 4, 10.—Concr. of the rising place itself, Amm. 14, 2, 13.
Lewis & Short
A Latin Dictionary, 1879
An open-access project