I have been trying to research and catalog words that describe phenomenon related to an attitude or state to things that involve neither superficially positive nor negative immediate impacts (or does not involve significant positive nor negative emotions of the agent that uses them), words that along the lines of JK Rowling's quote
"Indifference and neglect often do much more damage than outright dislike"
I figure if there is a phrase or a single word that can describe the category that all these words belong to may help me on locating more of them efficiently.
The words subjectively reminds of the concept of nothingness or nihilism or despair, but words that describe nothingness and despair do not accurately capture the objective meaning because the words listed in the title is often used in an active (and often derogatory) form rather than a neutral state of something. They are also not as direct, intense, as clearly derogative and negative terms like despair, but of a more subtle nature (which in this case, the negative impact is not immediately apparent but takes time to become obvious).
As an example of usage, this umbrella term (or phrase) should be able to modify JK Rowling's quote as follows
"[The phrase to be seeked, that can encompass every (English) word that has the same nature as the words and phrases in the title ] often do much more damage than outright dislike"
EDIT: Interjection such as Whatever, Anyway are not preferred because the word or phrase is intended to be used in a non colloquial context
What is the umbrella terms for these often derogative, but subtle words?