toimivampien
The word "toimivampien" is the genitive plural form of the Finnish adjective "toimivampi". "Toimivampi" itself is the comparative form of "toimiva", which translates to "working", "functional", or "effective". Therefore, "toimivampien" signifies "of the more working", "of the more functional", or "of the more effective" things or entities, depending on the context.
This grammatical form is used when referring to a possessive relationship or a part of a group