Acclivity
Ac`cliv´i`ty
| n. | 1. | A slope or inclination of the earth, as the side of a hill, considered as ascending, in opposition to declivity, or descending; an upward slope; ascent. |
| Noun | 1. |  acclivity - an upward slope or grade (as in a road); "the car couldn't make it up the rise" |