so remarkably different or sudden as to cause momentary shock or alarm; "Sydney's startling new Opera House"; "startling news"; "startling earthquake shocks"
so extremely ugly as to be terrifying; "a hideous scar"; "a repulsive mask"
grossly offensive to decency or morality; causing horror; "subjected to outrageous cruelty"; "a hideous pattern of injustice"; "horrific conditions in the mining industry"
inspiring fear; "the formidable prospect of major surgery"; "a tougher and more redoubtable adversary than the heel-clicking, jackbooted fanatic"- G.H.Johnston; "something unnerving and prisonlike about high grey wall"
extremely impressive in strength or excellence; "a formidable opponent"; "the challenge was formidable"; "had a formidable array of compositions to his credit"; "the formidable army of brains at the Prime Minister's disposal"
shockingly repellent; inspiring horror; "ghastly wounds"; "the grim aftermath of the bombing"; "the grim task of burying the victims"; "a grisly murder"; "gruesome evidence of human sacrifice"; "macabre tales of war and plague in the Middle ages"; "macabre tortures conceived by madmen"
strikingly beautiful or attractive; "quite stunning with large dark eyes and a beautiful high-bosomed figure"; "stunning photographs of Canada's wilderness areas"
causing or capable of causing bewilderment or shock or insensibility; "laid the poor fellow senseless with one stunning blow"; "a stunning detonation with volumes of black smoke"
causing great astonishment and consternation; "the strike came as a stunning protest against management"; "a stunning defeat"