kertaisen

Kertaisen is the genitive singular form of the Finnish adjective kertainen, which means one-time or single-use. In Finnish grammar, kertainen describes something that occurs or is used only once, as opposed to recurring or repeated. The form kertaisen is used to modify a noun in genitive, indicating possession or a related characteristic.

Etymology and meaning: kertainen derives from the noun kerta, meaning time or occasion, with the common adjectival suffix -inen to form a descriptive adjective. The resulting meaning is “related to a single occasion” or “one-time.” The genitive singular form kertaisen is then used to connect this description to a noun in the genitive case.

Usage: The primary function of kertaisen is to label one-time charges, events, or actions. For example, kertaisen maksun means “a one-time payment,” and kertaisen hankinnan kustannukset means “the costs of a one-time purchase.” Because Finnish adjectives agree with the noun they modify in case, the form kertaisen appears when the noun is in genitive (or when the phrase as a whole is in a genitive construction). It is not typically used as an independent lexical item; rather, it is a grammatical form of kertainen used in context.

Relation to related terms: kertainen is the base adjective, and its antonym or opposite concepts include toistuva (recurring) or jatkuva (continuous). The word kerta itself, meaning occasion or time, is the root from which kertainen and related terms are derived.

See also: kerta, kertainen, toistuva, maksut, hankinta.