mielenkiintoisen
Mielenkiintoisen is the genitive singular form of the Finnish word "mielenkiintoinen." In Finnish grammar, the genitive case is used to indicate possession or a relationship between nouns, similar to the English possessive "'s" or the preposition "of." Therefore, "mielenkiintoisen" translates to "of interesting" or "interesting's" in English, depending on the context.
The adjective "mielenkiintoinen" itself means "interesting." It is used to describe something that arouses curiosity, attention,