yksisuuntaisia

Yksisuuntaisia is a Finnish adjective meaning unidirectional or one-way, describing things that proceed or operate in a single direction. It is the plural form used with plural nouns; the singular form is yksisuuntainen. The word is typically employed in contexts where movement, flow, or design is restricted to one direction.

In everyday language, yksisuuntaisia is common in transport and urban planning discussions. For example, yksisuuntaiset kadut refer to streets where traffic is allowed in only one direction, and yksisuuntaisia liikennejärjestelyjä describes traffic arrangements designed to favor a single flow. The term also appears in signage and policy discussions about safety and efficiency, signaling a deliberate directional constraint.

Beyond transportation, the adjective is used in scientific and technical discourse to characterize processes or phenomena that proceed in one direction. In physics, chemistry, or biology one might encounter phrases such as yksisuuntaiset virtaukset or yksisuuntaiset reaktiot to denote unidirectional flow or reaction pathways.

Grammatical note: yksisuuntaisia is the partitive plural form of the adjective, used when describing a partitive or non-countable plural noun or in contexts requiring the partitive case.

See also: yksisuuntainen.