The word 'virile' traces a direct path from the Latin adjective 'virilis', meaning "of a man, manly, masculine." This, in turn, derives from the Latin noun 'vir', signifying an adult male, specifically one with the qualities of strength and valor. The Proto-Indo-European root 'wiH-ro-' lies at the origin, a term for "man" also giving rise to words like 'werewolf' (man-wolf) and the first element in 'world' (originally "age of man"). The semantic logic is transparent: the literal meaning "pertaining to a man" evolved in English to specifically denote the characteristic physical strength, vigor, and procreative power traditionally associated with masculinity.

Structure: vir (man) + ile (adjective suffix) - vir: Latin origin, meaning "man, adult male." Its functional role is the core root conveying the concept of manhood. - ile: Latin adjectival suffix '-ilis', meaning "pertaining to, capable of." Its role is to form an adjective from the noun root.