yksiaikaisia

Yksiaikaisia is a Finnish adjective form meaning one-time or occurring at a single point in time. It is used to describe something that is not repeated and applies to a single time period. The form yksiaikaisia is the plural partitive form, used before a plural noun in the partitive case, for example yksiaikaisia tapahtumia, “one-time events.”

In Finnish, the noun phrase would contrast with samanaikainen, which means simultaneous or occurring at the same time. Yksiaikainen thus signals a single occurrence or instance, rather than a shared or concurrent one. The term can be used in various formal or technical contexts where temporality is important, such as scheduling, interventions, or measures that are intended to take place only once. In everyday language, speakers may opt for alternatives such as kertaluonteinen (one-off), yksittäinen (individual/single), or yhden kerran tapahtuva (occurring once).

Etymology and morphology: yksiaikainen is formed from the elements yksi (one) and aika (time) with the common Finnish adjective suffix -inen. The plural partitive ending -sia/-isia is used when the modifier precedes a plural noun in partitive, yielding forms like yksiaikaisia ratkaisuja or yksiaikaisia tapahtumia. This reflects standard Finnish inflection where adjectives agree with the nouns they modify in number and case.

Notes: Yksiaikaisia is relatively specialized and may be less common in everyday speech. When clarity is needed, speakers may substitute more everyday terms such as kertaluonteinen or yhden kerran tapahtuva, depending on context. See also kertaluonteinen, yksittäinen, samanaikainen.