doplkové

Doplkové is an adjective used in Czech to denote something that is supplementary, additional, or auxiliary to a main item, system, or service. The standard form with proper diacritics is doplňkové, and it is commonly found in technical, industrial, and commercial language to describe components, features, or offerings that extend rather than replace the primary element.

Etymology and form: The word derives from doplněk, meaning supplement, with the adjectival suffix -kové, which marks relation or belonging. In everyday or non-specialist texts, you may also encounter the base form doplňkový used in different grammatical genders, with the neuter plural form often appearing as doplňkové.

Usage and examples: Doplňkové terms are widespread in descriptions of products and systems. Examples include doplňkové zařízení (auxiliary equipment), doplňkové součástky (auxiliary parts), doplňkové moduly (add-on modules), and doplňkové funkce (auxiliary or supplementary functions). In services, doplňkové služby refer to optional or extra services offered alongside a core service. The word emphasizes that the item is not essential to the principal function but enhances capability, flexibility, or value.

See also: doplňkový, doplněk, přídatný. Notes: While doplňkové is common in Czech, the exact terminology can vary by industry, and equivalent English terms include “add-on,” “auxiliary,” or “supplementary,” depending on context. In non-C Czech contexts, the diacriticless form may appear but is less correct.