sloping

/ˈsloʊpɪŋ/
adjective
  1. Having a gradual incline or slant; not flat or level.
    • The driveway is sloping, so be careful when it's icy.
    • They sat on the sloping grass hill and watched the sunset.
    • The house has a sloping roof to let rain run off easily.
Antonyms
What does "sloping" mean? | whatsthatwordmean | whatsthatwordmean