Vacā — specific speech and clarity action
Voice / throat proxy
Vacā is placed at a throat and voice proxy to make its traditional speech-and-clarity associations visible. The location is a target-organ projection of a substance action, not a claim about vocal anatomy or guaranteed cognitive efficacy.
Point 4 of 6 in Prabhāva — Specific Herb Actions
Cross-tradition overlaps
No overlapping points are registered for this point.
Sources
Śārṅgadhara Saṃhitā (primary_canonical)
Pūrva-khaṇḍa's dravyaguṇa definitions establish the interpretive distinction between general properties and a distinctive prabhāva action.
Bhāvaprakāśa Nighaṇṭu (primary_canonical)
Materia-medica entries for vacā describe its voice, speech, and clarity-oriented applications; the throat point is an editorial target-organ proxy.