sellaiseen

Sellaiseen is a Finnish word that functions as the illative form of the demonstrative adjective or pronoun sellainen, meaning “such a” or “that kind of.” It is used to refer to something of a particular kind and to indicate movement or relation toward that kind in a sentence, often after verbs of coming or going or with prepositions.

In use, sellaiseen appears in phrases that describe entering, moving toward, or committing to that kind of thing, as well as in expressions about belief or attitude toward that kind. Examples include: En usko sellaiseen (I don’t believe in such things), Emme halua joutua sellaiseen tilanteeseen (We do not want to end up in such a situation). Sellaiseen can also function with a following noun to specify the kind of thing being discussed, for example, sellaiseen tapaan (in such a manner).

Morphology and inflection: sellaiseen is the singular illative form of sellainen. Finnish demonstratives are declined for case and number, so related forms include: nominative sellainen (such a), genitive sellaisen, partitive sellaista, illative sellaiseen, inessive sellaisessa, allative sellaiselle. In plural, common forms are nominative sellaiset, genitive sellaisia, illative sellaisiin, inessive sellaisissa, allative sellaisille. The partitive plural is typically sellaisia, used with plural nouns in a partitive sense.

Etymology and relation: sellaiseen derives from the base demonstrative sellainen, a word used to generalize or categorize. It is widely used in both spoken and written Finnish to express reference to “such a …” and to convey attitudes toward a described kind or category. See also sellainen and related demonstratives for broader usage.