sloping

(verb) be at an angle. Synonyms: slope, incline, pitch. Example: "The terrain sloped down."

(adj) having an oblique or slanted direction. Synonyms: aslant, aslope, diagonal, slanted, slanting, sloped.

(adj) having a slanting form or direction. Examples: "An area of gently sloping hills." "A room with a sloping ceiling."