Atrocious (adj) – very bad, of very poor quality, horrifying
Source: Merriam-Webster
http://www.merriam-webster.com/dictionary/atrocious
Found in “The Yellow Wallpaper” by Charlotte Perkins Gilman. page 59, paragraph 7
I am sitting by the window now, up in this atrocious nursery, and there is nothing to hinder my writing as much as I please, save lack of strength.
She (the narrator) came to this new house for cure of her depression with her husband, but since the beginning of the story, her description of this house is very unpleasant and negative. And she is not getting better at all although she is staying in the house for her nursery. So the nursery she is having right now is not really good or effective. Also she feels like the house is haunted and she doesn’t like the house where she has to stay for the summer for nursery. She might feel like she is in horrifying or cruel nursery.