the.com/vocal

means Having or relating to the voice, or—more pointedly—expressing yourself loudly and often about what you think.

from Straight from Latin vocalis, 'sounding, speaking,' built on vox, 'voice.' That same vox root gives us vowel, voice, vocation, and evoke — a whole family of words about things that call out or get spoken aloud. English picked up 'vocal' in the 1500s mostly for music and speech; the slide toward 'opinionated and won't shut up about it' is a much later, very human extension.