A ghastly murder.
Bad injuries that are so horrible you have to look away are an example of ghastly injuries.
A person who is very pale and sick is an example of someone who would be described as looking ghastly.
A really ugly wallpaper is an example of something you would describe as ghastly wallpaper.
He turned ghastly pale on hearing the news.
Origin of ghastly
- Alteration (influenced by ghost) of Middle English gastli from gasten to terrify aghast
From American Heritage Dictionary of the English Language, 5th Edition