Eristettyjen

Eristettyjen is a Finnish grammatical form that functions as the genitive plural of the past passive participle eristetty, which derives from the verb eristää meaning to insulate or to isolate. In Finnish, eristetty is used both as a participle and as an adjective, and eristettyjen is the genitive plural form used when the noun it accompanies is in the genitive case. The form is not a stand-alone noun but appears in noun phrases such as eristettyjen rakennusten energiatehokkuus, where it denotes possession or association with insulation.

In actual usage, eristettyjen appears in contexts describing characteristics of multiple items. It commonly precedes a following noun in genitive, for example: eristettyjen rakennusten energiatehokkuus (the energy efficiency of the insulated buildings) or eristettyjen tilojen ilmanvaihdon toimivuus (the functioning of the ventilation of the insulated spaces). The meaning hinges on context and can refer to physical insulation (building or electrical isolation) or, more figuratively, to some form of separation or isolation.

Etymology and formation: eristettyjen is formed from the past passive participle eristetty plus the genitive plural ending -jen, a typical pattern for PPP-based adjectives in genitive plural. The form illustrates how Finnish uses participles as adjectives within inflected noun phrases rather than as standalone nouns.

See also: eristetty, eristää, eristys.