aktivní

Aktivní is a Czech adjective meaning “active.” It is used to describe people, objects, or processes that perform actions, are engaged, or are in operation. The term appears across everyday language, science, and technical contexts to denote activity or energy rather than mere potential.

Etymology and forms: Aktivní comes from the root aktiv- with the adjectival suffix -ní, forming a common Czech -ní adjective. The adverb form is aktivně. Comparatives and superlatives are aktivnější and nejaktivnější. The opposite is pasivní. In the nominative singular, aktivní has the same form for all genders (aktivní muž, aktivní žena, aktivní dítě).

Usage and examples: In everyday speech, aktivní describes a person who is involved or energetic, as in aktivní životní styl (an active lifestyle) or aktivní člověk (an active person). In pharmacology or chemistry, the term appears in phrases such as aktivní složka or aktivní látka to distinguish a substance with a biological effect from its inactive form (neaktivní). In biology and medicine, expressions like aktivní transport or aktivní pohyb refer to processes driven by energy. In technology and computing, one speaks of aktivní účet or aktivní proces, indicating current operation or status. The word can also appear in sport, education, and social contexts to emphasize engagement or initiative.

Grammar and notes: Aktivní is commonly used attributively or predicatively, e.g., Ten člověk je aktivní. It declines like other adjectives of the -ní type, adapting to case, number, and gender as appropriate.