This is the 948th most frequent Finnish word.
yhdistys
An association or organization.
The term "yhdistys" here is used to refer to an organization or association that has a specific purpose, in this case, helping young individuals.
Tämä yhdistys auttaa nuoria.
This association helps young people.
Here, "yhdistys" is in a possessive form, "yhdistyksen," indicating that the rules belong to the association.
Yhdistyksen säännöt määritellään vuosikokouksessa.
The association's rules are defined in the annual meeting.
The word "yhdistykseen" is in the illative case, showing direction towards the association, typically used for joining or becoming a member.