historisisiin

Historisisiin is a Finnish inflected form of the adjective historiallinen, meaning historical. It is used as the illative plural form, typically to express movement toward or entry into multiple historical contexts, events, or aspects when the object of the sentence is in the illative plural.

In standard Finnish orthography the common form of this illative plural is historiallisiin, with a double l. The variant historisisiin appears in some texts and has been described as nonstandard or less common in modern style guides. The choice between forms can reflect author preference or historical spelling practices, but historiallisiin is the form most widely recommended in contemporary Finnish.

Usage of historisisiin occurs mainly in formal or academic writing, journalism, and discourse that discusses materials, events, or concepts in a plural historical sense. For example, phrases like historiallisiin tapahtumiin or historiallisiin kysymyksiin illustrate how the illative plural directs attention toward historical content in a pluralized object. The form is tied to the broader Finnish system of adjective inflection, where historias-related adjectives agree with the noun in case and number.

Etymologically, historisisiin derives from historiallinen, itself from historia, the Finnish word for history, which ultimately traces back to Latin historia. Related terms include historiallinen (historical) and historia (history). The illative plural is one of several case-based forms used to express direction or relationship in Finnish syntax.

See also: historiallinen, historia, historiografia.