täydentävistä

Täydentävistä is a Finnish adjective form used in grammar to indicate a group of items that provide supplementary or additional elements. It is the elative plural form of the participial adjective täydentävä, which means complementary or supplementary. In practice, täydentävistä appears in noun phrases when the head noun is in the elative case and the modifier describes the items as being supplementary.

In usage, täydentävistä functions as a normal adjective within a larger phrase. The phrase typically precedes a plural noun in the elative case, for example täydentävistä osista or täydentävistä perusteista, to convey that the referenced parts or grounds are supplementary in relation to a larger context. The semantics center on the idea of additional components that complete a system or argument.

Examples of how the form is used in Finnish sentences include phrases such as: "täydentävistä osista koostuva kokonaisuus" meaning “a whole composed of supplementary parts,” and "täydentävistä perusteista johdetut päätökset" meaning “decisions derived from supplementary grounds.” The construction relies on standard Finnic word order and case agreement, with täydentävä modifying a noun in the elative plural.

Etymology and related terms: täydentävä is derived from the verb täydentää, meaning “to complete.” Related concepts include täydennys (completion/addition) and täydennysvaihe (augmentation phase). In Finnish grammar, täydennys- related terms are part of descriptive analyses of how components relate to a broader structure.

See also: Finnish grammar, adjectives, elative case, participles, täydennys.