Extremely unpleasant and shocking, and usually dealing with death or injury. (Cambridge Dictionary)
Something that is gruesome is extremely unpleasant and shocking. (Collins Dictionary)
Inspiring horror or repulsion: Grisly. (Merriam – Webster)
Causing repulsion or horror; grisly. (Oxford Dictionaries)
Five dark and gruesome fairytales behind classic Disney movies.
The top 10 most gruesome Slayer songs.