toistettavien
Toistettavien is the genitive plural form of the Finnish adjective toistettava, meaning repeatable or to be repeated. In Finnish, adjectives agree with the noun they modify in number and case, and the genitive plural ending for adjectives is typically -ien. Therefore, toistettavien is used when the noun it describes is in the genitive plural, for example in phrases like toistettavien asioiden lista ("a list of repeatable things") or toistettavien tehtävien suorittaminen ("the execution of repeatable tasks").
The base meaning of toistettava is something that can be repeated or is intended to be repeated.
Related forms include toistettavat (nominative plural) and toistettavan (genitive singular), reflecting standard Finnish adjective declension. Understanding
In summary, toistettavien is a specific inflected form used to describe multiple repeatable things in the genitive