Yhteismassan
Yhteismassan is the genitive form of the Finnish noun yhteismassa. In standard Finnish, yhteismassa is not a common, widely used noun; if encountered, it is usually in specialized or metaphorical contexts. The word is formed from yhteis- (shared, communal) and massa (mass, body, group).
Because yhteismassa is not a common lexical item, yhteismassan is typically seen only inside longer noun phrases
Interpretation and usage: In non-technical prose, yhteismassan as a genitive would be read as indicating possession
See also: Finnish grammar; Genitive case; Yhteismetsä; Yhteisomaisuus.