Sastavni

Sastavni is an adjective used in several South Slavic languages, notably Croatian, Serbian, and Bosnian, to denote something that constitutes a part of a larger whole. It is equivalent to terms like constituent, component, or composite. The word is typically applied to parts, elements, or members that form or belong to a system, object, or process. Common collocations include sastavni dio (a constituent part) and sastavni element (a component element).

The term derives from the noun sastav, meaning composition or structure, and the verb sastaviti, meaning to assemble or put together. Because of its meaning, sastavni is widely used across technical, scientific, and everyday language to specify which parts belong to a larger entity. Its usage is flexible and often appears in phrases describing machinery, systems, materials, software, and organizational structures where individual components contribute to the whole.

In practice, synonyms and close alternatives include dio (part), komponenta (component), element, and konstitutivan (constitutive). The exact nuance may vary by language and context, but the core idea remains that something is a necessary part that helps form or function of a larger unit. See also: sastav, sastaviti, dijelovi, komponenta.