aineryhmien
Aineryhmien is the genitive plural form of aineryhmä, a Finnish noun formed from aine ('substance', 'matter') and ryhmä ('group'). In Finnish texts, aineryhmät denote a core or primary subset within a larger category. The exact interpretation is context-dependent: in some analyses it refers to central, foundational groups used as the basis for further classification or study, while in other usages it may indicate a cluster of entities that share essential properties.
Because there is no single universal definition, authors typically specify what constitutes aineryhmät in their work.
In practice, aineryhmien serves as a conceptual tool to organize complex sets by focusing on a manageable