Kosteuttavaan

Kosteuttavaan is the illative singular form of the Finnish present active participle kosteuttava, derived from the verb kostuttaa meaning to moisten or hydrate. The form reflects how Finnish participles can function like adjectives and take case endings to agree with the noun they describe.

In usage, kosteuttava describes something that provides moisture or hydration. When it accompanies a noun in the illative case, the adjective also takes the illative ending, producing forms such as kosteuttavaan. This is typically seen in phrases that indicate motion toward or into something described as moisturizing, for example into a moisturizing substance or product.

Examples of the illative usage include kosteuttavaan voiteeseen (into a moisturizing cream / toward a moisturizing cream) and kosteuttavaan tuotteeseen (into a moisturizing product). The nominative form kosteuttava would appear before a noun in the base (e.g., kosteuttava voide, “moisturizing cream”). The related forms also exist in other cases, such as kosteuttavan voiteen (genitive) and kosteuttavaa voidetta (partitive), to express different grammatical relations.

Kosteuttavaan is thus part of Finnish morphology where participles behave as adjectives and inflect for case, number, and gender by combining with the noun they modify. Its primary function is to convey that the described item provides moisture or hydration.

See also: kostuttaa, the verb meaning to moisten; present active participles in Finnish; Finnish case system and adjective declension.