IPA: //ˈkætəɡɔrɪkəl//
KK: /ˈkætəˌɡɔrɪkəl/
Relating to or based on categories; absolute and without exceptions.
The manager made a categorical statement about the company's future plans.
Categorical → It is formed from "categoricalis" (from Latin, meaning relating to a category) and the suffix "-al" (meaning pertaining to). The word "categorical" refers to something that is absolute or unqualified, relating directly to a specific category without exceptions.
Think of something that is 'pertaining to a category' — that's what categorical means, as it describes something that is absolute and clearly defined.