This is the 851st most frequent Finnish word.
kansalaisten
"Of the citizens" or "citizens'".
Here, 'kansalaisten' is in the genitive plural form, indicating possession of the 'rights', which connects citizens to their rights as protected by the constitution.
Kansalaisten oikeudet ovat perustuslaissa.
The rights of the citizens are in the constitution.
The word 'kansalaisten' is used to indicate that the lives being referred to belong to or are associated with the citizens, illustrating possession and influence.
Politiikka vaikuttaa kansalaisten elämään monin tavoin.
Politics affects the lives of citizens in many ways.
Here, 'kansalaisten' is the genitive plural form of 'kansalainen', indicating possession ('of citizens').