rikkaimpia
Rikkaimpia is a Finnish linguistic term referring to the partitive plural form of the superlative adjective derived from the adjective rikas, meaning rich. The basic adjective rikas forms the comparative rikkaampi and the superlative rikkaimmat. The form rikkaimpia is used when the noun it modifies is in the partitive case, for example in phrases like rikkaimpia maita (“the wealthiest countries”).
In practical use, rikkaimpia appears in constructions that indicate a subset or are part of a larger
Etymologically, rikkaimpia is formed from the root rikas with the standard Finnish superlative and case agreement