The word 'verbal' traces its lineage directly to Latin verbalis, meaning "consisting of words" or "derived from a verb", which itself is formed from verbum ("word"). The root verbum is thought to derive from the Proto-Indo-European root werh₁-, meaning "to speak" or "to say", which also gives us the English word "word". Over time, the meaning of 'verbal' in English specialized in two key directions: first, to describe anything pertaining to words in general, and second, to specify something that is spoken rather than written, highlighting the original connection to spoken language. The third common definition, "relating to a verb", preserves the more technical grammatical link to its Latin source.

Structure: verb (word) + al (adjective suffix) - verb: From Latin verbum, meaning "word". In this word, it functions as the core root. - al: A suffix of Latin origin (-alis) used to form adjectives meaning "of, relating to, or characterized by".