adjektiiviin

Adjektiiviin is the illative singular form of the Finnish noun adjektiivi, which means “adjective.” In Finnish grammar, the illative case typically marks direction toward or into something, and when applied to a noun it can indicate movement into a category or class, or be used in linguistic descriptions. Therefore adjektiiviin is most commonly encountered in grammar texts, dictionaries, and other linguistic writings as the form used to refer to the noun adjektiivi in the illative case.

Morphology and formation: The nominative form is adjektiivi. The illative singular is adjektiiviin, formed by adding the illative suffix -iin to the stem adjektiivi-, which results in the characteristic double i before the final n. This form is part of the typical Finnish system of noun case endings and illustrates how nouns ending in -i behave in the illative. The illative plural forms for this noun would follow standard plural illative patterns in Finnish, such as adjektiiveihin, depending on usage and standard orthography.

Usage and context: Adjektiiviin is used in linguistic and grammar contexts to discuss the noun adjektiivi and its inflection. It appears in paradigm tables, explanatory prose about case endings, and when labeling examples that involve the category of adjectives. For learners, recognizing adjektiiviin as the illative singular helps understand how Finnish nouns change form across cases and how illative interacts with stems ending in -i.

Related terms: Other case forms of adjektiivi include adjektiivi (nominative), adjektiivin (genitive), adjektiiviksi (translative), and adjektiivilla/adjektiivissa (allative/inessive), among others. Adjektiivi is the base term for the word class “adjective” in Finnish grammar.