kiinnostavien
Kiinnostavien is a Finnish adjective form meaning “of interesting [things/subjects],” and it is the genitive plural form of kiinnostava, which means “interesting.” It is used to modify a noun that is in the genitive case, forming a compound noun phrase or showing a relationship to the genitive noun.
In practice, kiinnostavien appears in phrases such as kiinnostavien asioiden lista (a list of interesting things)
Etymologically, kiinnostava is derived from the verb kiinnostaa, “to interest,” with the -va/-vä adjective suffix. The