Adjective ghastly has 2 senses
- ghastly, grim, grisly, gruesome, macabre - 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"
Antonym: unalarming (indirect, via alarming)
- charnel, ghastly, sepulchral - gruesomely indicative of death or the dead; "a charnel smell came from the chest filled with dead men's bones"; "ghastly shrieks"; "the sepulchral darkness of the catacombs"
Antonym: inoffensive (indirect, via offensive)
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