lukuisien

Lukuisien is the genitive plural form of the Finnish adjective lukuisa, meaning numerous or many. In Finnish, adjectives agree with the nouns they modify in number and case, so lukuisat (nominative plural) becomes lukuisien when the noun is in the genitive plural. The form is used to describe a plural noun that is themselves in the genitive case, or as part of a broader genitive construction.

Examples include lukuisien ihmisten mielestä (in the opinion of many people) and lukuisien tutkimusten mukaan (according to numerous studies). The construction emphasizes quantity and is common in formal or academic Finnish.

Other inflected forms commonly seen with this adjective include lukuisan (genitive singular) and lukuisia (partitive plural). For instance, lukuisia tutkimuksia means numerous studies in a sentence where the noun is in partitive plural; lukuisien tutkimusten mukaan again uses the genitive plural. The word derives from lukuisa, rooted in luku- meaning “number,” with the -isa suffix forming an adjective meaning “numerous.”