asuinrakennustensa
Asuinrakennustensa is a Finnish grammatical form that marks possession of multiple residential buildings, typically translated as “their residential buildings’” or “of their residential buildings.” It is a genitive plural construction used in noun phrases to connect a possessed noun to its possessor, often in written or formal language.
The form is built from asuinrakennus (residential building). Its plural nominative is asuinrakennukset, the genitive plural
Usage and examples: asuinrakennustensa katot refers to the roofs of their residential buildings, and asuinrakennustensa ikkunoiden