kielellisiin

Kielellisiin is a Finnish grammatical form: the illative plural form of the adjective kielellinen, which means linguistic or language-related. It is used to modify a plural noun in the illative case, which in Finnish indicates direction toward or into a domain or field.

In Finnish, adjectives agree with the nouns they modify in case and number. When the noun is plural and in illative, the corresponding adjective takes the illative plural ending, resulting in forms such as kielellisiin. The exact ending can vary with vowel harmony and stem; in this case, -isiin is the illative plural ending for kielliteral adjectives like kielellinen.

Common uses include phrases that describe into what area or domain something is directed, especially in scholarly or analytical writing. For example, kielellisiin ilmiöihin means into linguistic phenomena, kielellisiin eroihin means into linguistic differences, and kielellisiin kysymyksiin means into linguistic questions. These constructions typically occur with a plural illative noun and convey movement or focus toward linguistic aspects or topics.

Etymologically, kielellinen derives from kieli (language) with the adjectival suffix -llinen, forming a word that means language-related. The illative plural form kielellisiin is therefore a specific inflection used to express direction toward linguistic subjects in plural statements.

See also: kielellinen, kielitiede, kieli, as well as other Finnish inflectional forms for adjectives in illative mood.