Meaning

noun chemical agent capable of activity

noun the voice used to indicate that the grammatical subject of the verb is performing the action or causing the happening denoted by the verb

noun a person who is a participating member of an organization

originEtymology tree Proto-Indo-European *h₂eǵ- Proto-Indo-European *-eti Proto-Indo-European *h₂éǵeti Proto-Italic *agō Latin agō Proto-Indo-European *-wós Proto-Indo-European *-iHwósder. Latin -īvus ▲ Ancient Greek ἐνεργητῐκός (energētĭkós)sl. Latin āctīvusbor. Old French actifbor. Middle English actyf English active From Middle English actyf, from Old French actif, from Latin āctīv(us), from agere…

Etymology from Wiktionary, CC BY-SA 3.0