peräisen

Peräisen is a Finnish morphological form rather than a stand-alone lexical item. It functions primarily as the genitive singular form of the adjective peräinen, which describes something related to the rear, hind, or posterior. In practice, peräisen arises in noun phrases that express a relationship to another noun, often in contexts describing parts or positions.

Etymology and form: peräinen is formed from the word perä, meaning rear or back, with the suffix -inen to create an adjective. When the adjective is used in a genitive construction, its form changes to peräisen to agree with the noun it modifies in genitive. The same genitive shape can also appear as the oblique form of a surname ending in -nen, such as Peräinen, where the possessive or relational sense is expressed by Peräisen.

Usage: As a grammatical form, peräisen appears in phrases indicating possession or association with a rear part or section. For example, peräisen osan korjaus can be rendered as “the repair of the rear part,” and peräisen katon kunto as “the condition of the rear part of the roof.” When the word functions as a surname, Peräisen serves as the genitive form of Peräinen, used to attribute something to a person named Peräinen, for instance, Peräisen mielipide (the opinion of Peräinen).

Notes: Peräisen does not have an independent dictionary meaning beyond its role as a case-form of peräinen or as the inflected form of the surname Peräinen. Its appearance is largely limited to grammatical constructions and proper names, rather than everyday vocabulary.

See also: Finnish grammar, adjectives in Finnish, Finnish surnames ending in -nen.