keskeisimmänsä
Keskeisimmänsä is the superlative form of the Finnish word "keskeinen," which translates to "central," "key," or "essential." The suffix "-nsä" indicates a possessive, meaning "its" or "his/her/their own." Therefore, "keskeisimmänsä" literally means "its most central," "his/her most key," or "their most essential." This grammatical construction is used when referring to something that is the absolute most important or fundamental element within a particular context.
For example, in a sentence like "Tämä on projektin keskeisimmänsä osa," it translates to "This is the