slope: [15] The noun slope did not emerge until the 17th century. Originally it was an adverb, short for the now defunct aslope. This is generally supposed to go back to an unrecorded Old English *āslopean, an adverbial use of the past participle of āslūpan ‘slip away’. Such a scenario would appear to fit in well with the colloquial slope off ‘leave’, but in fact this usage did not emerge until the early 19th century, in America.
slope (n.)
1610s, "inclination," from slope (v.). Meaning "an incline, a slant (of ground)" is from 1620s. Derogatory slang meaning "Oriental person" is attested from 1948.
slope (v.)
1590s, "go in an oblique direction," from earlier adjective meaning "slanting" (c. 1500), probably from Middle English aslope (adv.) "on the incline" (late 15c.), from Old English *aslopen, past participle of aslupan "to slip away," from a- "away" + slupan "to slip" (see sleeve). From 1709 as "to be in a slanting position;" transitive sense "place in a slanting position" is from c. 1600. Related: Sloped; sloping.
例文
1. He wonders why the digits on his calculator slope to the right.
彼はなぜ彼の計算機の上の数字が右に傾いているのか分からない。
2.Suddenly I was cartwheeling down the slope ，all orientation gone.
突然、私は骨がだるく坂を転げ落ち、完全に頭がくらくらした。
3.From the slope below，the wild goats bleated faintly.
山の斜面の下で、野ヤギがヒソヒソと鳴いている。
4.The slope increases as you go up the curve.
カーブを上ると、道はますます険しくなってきた。
5.He put the jeep in four-wheel drive and splashed up the slope .