massaperusteisista

Massaperusteisista is a Finnish adjective form meaning mass-based or based on large-scale data or quantities. It derives from the compound massa (mass) and perusteinen (based on,-founded) and is used to describe approaches, methods, or systems that rely on large-scale data, samples, or bodies of information rather than on small samples or individual cases. The word is part of technical and policy-oriented Finnish vocabulary and is not common in everyday speech.

In grammatical terms, massaperusteisista is the elative plural form of massaperusteinen. This means it is used to refer to "from the mass-based [things]" or to describe multiple mass-based entities in contexts where the elative case is appropriate. The base adjective has other inflectional forms such as massaperusteinen (singular nominative) and massaperusteiset (plural nominative). The form massaperusteisista will typically occur with a following plural noun in the elative case, for example massaperusteisista päätöksentekoprosesseista (from the mass-based decision-making processes).

Usage is common in scientific, technical, and policy discourse, particularly in discussions of data-driven or scale-based methodologies. It may appear in debates about efficiency, accuracy, or fairness when large data sets or mass-scale considerations are central. Examples of usage include statements about approaches, evaluations, or results that derive from mass-based sources rather than from individual or small-sample observations.

Overall, massaperusteisista functions as a specialized grammatical form signaling a relationship to mass-based concepts, commonly found in Finnish written discourse on data, systems, and policy.