istumiseen

Istumiseen is a Finnish word form, the illative case of the verbal noun istuminen, and can be translated as "to (or into) sitting" or "for sitting." It is used to indicate movement or transition into the state of sitting, the target or purpose of an action, or the object of verbs that govern the illative.

Grammatical formation and role: istuminen is a nominalization of the verb istua ("to sit"); its illative singular is formed as istumiseen. As an illative noun, it commonly appears after verbs such as ryhtyä, alkaa, tottua and sopeutua, and in expressions that describe a change of state, purpose or direction toward sitting.

Usage examples: in Finnish sentences, istumiseen appears in phrases like "Hän sopeutui istumiseen" (He/she adapted to sitting) and "Aika istumiseen vähenee" (Time for sitting decreases). It contrasts with the infinitive form istumaan (colloquial "to sit down") and the nominative noun istuminen ("sitting" as a concept).

Related forms: istua (verb), istuminen (noun, nominative), istumisen (genitive), istumista (partitive), and istumaan (instructive/illative-like colloquial use). As a grammatical element, istumiseen illustrates how Finnish case endings mark roles and relationships that English often expresses with prepositions.