Koostuvassa

Koostuvassa is a Finnish grammatical form of the adjective koostuva, meaning "consisting of" or "composed of." It is the inessive singular form, used to describe a noun that is in a state of being composed of several components. The underlying verb is koostua, “to consist of,” and the present participle suffix -va/-vä turns it into an adjective.

In practice, koostuvassa functions as an attributive modifier that agrees with the noun in both number and case. It is most common in formal or technical Finnish, such as engineering, chemistry, architecture, and scientific writing, where systems, materials, or mixtures are described in terms of their constituents. For example, koostuvassa rakenteessa can be translated as “in a structure that is composed of” and koostuvassa seoksessa as “in a mixture that is composed of.” The form helps convey a state rather than a process, focusing on what the object consists of.

Compared with simpler expressions, koostuva (a more general form meaning “composed of”) is often used, but koordinations like koostuvassa provide a precise locational or state-based nuance. The word is part of a broader set of related forms derived from koostua, including other case forms and the predicative use koostuva (without a case ending).

See also:

- koostuva

- koosta

- koostua