ghastful

adj

1. (archaic)Causing fear; terrifying.

   “Very desolate was that valley, having a dark aspect and a ghastful, such as a man might look for in the infernal glens of Pyriphlegethon or Acheron.”

2. (archaic)Terrified, frightened.

   “Th' Almighty anſwers — "I my ſelf will place "The dreadful Stains of Murther on the Face, "That all may ſhun thy Crimes and Fate. — He ſaid, The Caitiff heard, with ghaſtful Looks he fled.”