antiviral

The word "antiviral" is a modern scientific compound, clearly built from two recognizable parts. The prefix "anti-," of ancient Greek origin, has consistently carried the meaning of opposition, as seen in words like "antidote" or "antibody." The second element, "viral," derives from the Latin virus, which originally referred to a poisonous substance or venom. The modern, specific biological meaning of "virus" as an infectious agent developed in the late 19th century. Therefore, "antiviral" logically and transparently denotes something that acts "against a virus," whether as a descriptive adjective or as a noun for a therapeutic agent.

Structure: anti (against) + viral (relating to a virus) - anti: From Greek, via Latin. A prefix meaning "against," "opposite of," or "preventive." - viral: From Latin virus (poison, slime) + the English adjectival suffix -al. In modern usage, it pertains specifically to a virus.