rakennumisena
Rakennumisena is a Finnish grammatical form, specifically the essive case of the noun rakennuminen, which means construction or the act of building. The essive form conveys a temporary state or role and can be translated roughly as “as construction” or “in the form of construction.” It is mainly found in formal or technical language, such as planning documents, academic texts, or architectural discourse, rather than in everyday speech.
The base noun is rakennuminen (the act of building). By adding the essive suffix -na/-nä, it becomes
Rakennumisena is distinct from rakennuksena, which means “as a building” and refers to a physical built object
Essive case, Finnish grammar, rakennus (building), rakennuminen (construction process).