1) Hardest to climb 2) Highest priced 3) Least gradual 4) Most exorbitant 5) Most expensive 6) Most high-priced 7) Most inclined 8) Most precipitous 9) Most pricey 10) Most pricy 11) Toughest to climb 12) With the highest gradient Found on https://www.crosswordclues.com/clue/steepest
1) Hardest to climb 2) Highest priced 3) Least gradual 4) Most exorbitant 5) Most expensive 6) Most high-priced 7) Most inclined 8) Most precipitous 9) Most pricey 10) Most pricy 11) Toughest to climb 12) With the highest gradient