An elevated geological formation:
— He climbed the steep slope.

synonyms: incline, side.

Dutch: glooiing, helling, schuinte, val
Polish: zbocze, stok

The property possessed by a line or surface that departs from the horizontal.

synonym: gradient.

Roget 217: obliquity, inclination, slope, slant, crookedness etc. adj.; slopeness^†; leaning etc. v.; bevel, tilt; bias, list, twist, swag, cant, lurch; distortion etc. 243; bend etc. (curve) 245; tower of Pisa.    acclivity, rise, ascent, gradient, khudd^†, rising ground, hill, bank, declivity, downhill, dip, fall, devexity^†; gentle slope, rapid slope, easy ascent, easy descent; shelving beach; talus; monagne Russe [Fr.]; facilis descensus averni [Lat.].    ... show more

Dutch: richtingscoëfficient, glooiing, steilte, helling, schoot

Be at an angle:
— The terrain sloped down.

synonyms: incline, pitch.

Roget 623: abstain, refrain, spare, not attempt; not do etc. 681; maintain the even tenor of one's way.    eschew, keep from, let alone, have nothing to do with; keep aloof keep off, stand aloof, stand off, hold aloof, hold off; take no part in, have no hand in.    avoid, shun; steer clear of, keep clear of; fight shy of; keep one's distance, keep at a respectful distance; keep out of the way, get out of the way; evade, elude, turn away from; set one's face against etc. (oppose) 708; deny oneself.    shrink back; hang back, hold back, draw back; recoil etc. 277; retire etc. (recede) 287; flinch, blink, blench, shy, shirk, dodge, parry, make way for, give place to.    beat a retreat; turn tail, turn one's back; take to one's heels; runaway, run for one's life; cut and run; be off like a shot; fly, flee; fly away, flee away, run away from; take flight, take to flight; desert, elope; make off, scamper off, sneak off, shuffle off, sheer off; break away, tear oneself away, slip away, slink away, steel away, make away from, scamper away from, sneak away from, shuffle away from, sheer away from; slip cable, part company, turn one's heel; sneak out of, play truant, give one the go by, give leg bail, take French leave, slope, decamp, flit, bolt, abscond, levant, skedaddle, absquatulat [U.S.], cut one's stick, walk one's chalks, show a light pair of heels, make oneself scarce; escape etc. 671; go away etc. (depart) 293; abandon etc. 624; reject etc. 610.    lead one a dance, lead one a pretty dance; throw off the scent, play at hide and seek.    ... show more

Dutch: glooien, hellen