essiivivormi
Essiivivormi, or the essive form, is a grammatical form in Finnish used to express a temporary state or a role—essentially translating to “as” or “in the capacity of.” It is one of the Finnish case forms applied to nouns (and some adjectives) in predicative or descriptive contexts to indicate how something exists or functions at a given time, rather than a permanent attribute.
In singular, the essive is formed by adding the suffix -na or -nä to the stem, with
Usage notes: The essive is commonly used with the verb olla (to be) or verbs of functioning,