välisiin

Välisiin is a Finnish grammatical form of the noun väli, which means gap, interval, or space between things. It functions as the illative plural form, indicating movement into or into the set of gaps or intervals.

In Finnish, nouns change form to express case and number, and the illative plural is used when the speaker refers to entering into multiple gaps or intervals. The base stem väli-, combined with the plural illative suffix, yields välisiin. The form is most commonly encountered in written Finnish and in linguistic descriptions of Finnish grammar. Some older or dialectical sources may present variant spellings such as väleihin, reflecting regional pronunciation or historical shifts, but välisiin is widely recognized in standard Finnish.

Usage of välisiin typically appears in contexts discussing multiple gaps, spaces, or intervals, whether physical (such as openings or breaks) or abstract (such as ranges in data or time periods). It is one of several illative plural forms derived from -väli stems, and it contrasts with singular illative väliin and other plural cases like välit (nominative), välien (genitive), and välissä (inessive).

As with other Finnish inflected forms, oikean käyttö depends on the surrounding grammatical structure and the noun it governs. Välisiin can be found in grammar references and in prose that aims to be precise about entering into multiple gaps or intervals. See also väli, välit, and the general Finnish case system for related forms.