An additional tale records that a demon named Madan obtained Vak-siddhi, by which what ever he mentioned came real. He misused it to hassle humans and murder men and women. A further etymology implies that valga suggests "to paralyze" and symbolizes the power of stambhana, "paralysis" which the goddess is alleged to grant; https://www.youtube.com/shorts/5VeSyP9JRw0