Words such as 'bleak', 'dying', 'wrought', 'ghost', and 'sorrow' create an ominous and spooky atmosphere in "The Raven". These words have negative connotations, meaning that the words sound dark and frightening to the reader. For instance, if you wanted to create a spooky atmosphere in the following sentence, you might replace the verb with another word that has a more negative connotation.
A chill passed through the room.
A chill crept across the room.
While both sentences mean essentially the same thing, the second sentence sounds scarier because the verb has a more negative connotation.
Hope this helps!
In the excerpt, the word "pungent" refers to the pickles' aroma.
Pungent is a word to describe a very strong smell, very sharp and biting. So when Untermeyer used the word pungent to refer to the pickles, he was talking about their aroma, which is a fancy way to say smell.