IPA: /ʌnˈkætəɡəraɪzəbl/
KK: /ʌnˈkætəɡəraɪzəbl/
Something that cannot be placed into a specific category or group.
The artist's work is often considered uncategorizable because it blends multiple styles.
Uncategorizable → It is formed from "un-" (meaning not), "categorize" (from Greek "kategoria", meaning a class or category), and "-able" (meaning capable of). The word means not capable of being classified into a category.
Think of 'not' ('un-') being able to be 'classified' ('categorize') — that's why uncategorizable means something that cannot be placed into a category.