shockingly repellent
inspiring horror
e.g. ghastly wounds
e.g. the grim aftermath of the bombing
e.g. the grim task of burying the victims
e.g. a grisly murder
e.g. gruesome evidence of human sacrifice
e.g. macabre tales of war and plague in the Middle ages
e.g. macabre tortures conceived by madmen
Synonym: grim grisly gruesome macabre sick