pääluokkaan
Pääluokkaan is the illative form of the Finnish noun pääluokka, meaning the main class or primary category. In Finnish, illative marks movement into or inclusion within something and here appears as pääluokkaan. The compound pääluokka combines pää (main, head) with luokka (class, category), and the term denotes the principal category within a hierarchical structure.
In usage, pääluokkaan is used when describing that items or subcategories belong to or are moved into
Morphology and related terms: Finnish uses cases to indicate relationships; the illative form of a compound