kahdensuuntaisen

Kahdensuuntaisen is an Finnish adjective meaning two-directional or bidirectional. It describes something that can operate, move, or be exchanged in two directions, in contrast to selvän yksisuuntainen, which denotes one-way. The form kahdensuuntaisen is the genitive singular of kahdensuuntainen, used when modifying a noun in genitive or as part of a compound noun.

Etymology and grammar: the word is built from kahden (genitive of kaksi, meaning two) and suunta (direction) with the adjectival suffix -inen. The nominative singular is kahdensuuntainen, plural kahdensuuntaiset, and other cases follow standard Finnish adjective inflection. Kahdensuuntaisen is commonly seen in phrases such as kahdensuuntaisen liikenteen, kahdensuuntaisen tiedonsiirron, or kahdensuuntaisen viestinnän, where the noun that follows is in genitive form.

Usage and contexts: kahdensuuntaisen is widely used in technical, transportation, and information-technology contexts to describe systems, channels, or processes that support bidirectional operation. Examples include kahdensuuntaisen liikenteen hallinta (control of bidirectional traffic), kahdensuuntaisen viestinnän kanava (bidirectional communication channel), and kahdensuuntaisen dataliikenteen hallinta (management of two-way data traffic). The term appears in standards, specifications, and descriptive text that emphasize reciprocity or two-way capability.

See also and related terms: in Finnish technical language, the opposite concept is often expressed with yksisuuntainen (one-way). While kahdensuuntaisen can be used broadly, context determines whether kahdensuuntainen or kahdensuuntaisen is used in a sentence.