IPA: /ˈkætəɡəri/
KK: /ˈkætəˌɡɔri/
A group or class that shares common characteristics or qualities, used to organize or categorize similar items or ideas.
The library has a section for each category of books, including fiction, non-fiction, and reference.
Category → It is formed from "kata-" (meaning down) and "agoreuein" (meaning to speak or to declare). The word originally referred to a classification or a way of speaking down about a group or type of things.
Think of 'speaking down' ('kata-') about a group or type of things — that's how you remember that a category is a classification.