reaktiivset

Reaktiiviset is the plural nominative form of the Finnish adjective reaktiivinen, meaning reactive. It is used to describe entities, substances, or processes that respond to stimuli, changes in conditions, or interactions with other systems. The term is common across disciplines, including science, technology, and everyday language.

In Finnish grammar, adjectives of the -inen class form the plural nominative with -iset, so reaktiivinen becomes reaktiiviset when modifying a plural noun. Example: reaktiiviset aineet (reactive substances).

Common domains and phrases include chemistry (reaktiiviset aineet, reaktiivisuus), biology and psychology (reaktiiviset vasteet), and information technology (reaktiivinen ohjelmointi, reaktiiviset järjestelmät). In computer science, reactive programming is rendered in Finnish as reaktiivinen ohjelmointi, and discussions of reaktiiviset järjestelmät describe systems that respond to asynchronous input.

Etymology and usage notes: The form derives from the noun reaktio (reaction) with the -ivinen suffix, paralleling the English word reactive. The term denotes responsiveness and active response rather than passive behavior, and it is used in both technical and everyday Finnish to describe how something reacts to stimuli or changes.

See also: reaktiivisuus, reaktiivinen.