The word 'vocally' is built upon the Latin root vox, vocis, meaning "voice," which traces back to the Proto-Indo-European (PIE) root wekw-, meaning "to speak." This ancient root is the source of a vast family of words related to speech and calling, such as 'vocation' and 'invoke'. The adjective 'vocal' was formed in English from the Latin vocalis, meaning "uttering voice" or "speaking." By adding the ubiquitous Germanic adverbial suffix '-ly,' which denotes manner, the word 'vocally' was created to specifically describe an action performed by, with, or in the manner of the voice. Thus, the term's journey from the PIE concept of speech to its modern usage encapsulates the idea of expression through spoken sound.

Structure: vocal (voice) + ly (adverb suffix) - vocal: From Latin vocalis (sounding, speaking, of the voice), from vox (voice). Functions as the core adjective meaning "of or pertaining to the voice". - ly: From Old English -līc (having the form or character of). Functions as an adverbial suffix meaning "in a manner of".