सोपानम् २९: सुबन्त-पञ्च-सोपानी प्रक्रिया-मानचित्रम् (The Master 5-Stage Subanta Derivation Arc)
The macro architectural blueprint of nominal word derivation: Follow the classic paradigm 'वाच्' (*speech/word*) from Kālidāsa's Raghuvaṃśam 1.1 (*वागर्थाविव*) across the universal 5 Pāṇinian stations — Vivakṣā, Sup selection, It-pruning, Aṅga-processing (`चोः कुः`), and Pada-finalization (`वाक् / वाग्`).
जगतः पितरौ वन्दे पार्वतीपरमेश्वरौ ॥
"Like speech and its meaning intertwined, I bow to the parents of the universe, Pārvatī and Parameśvara, for the acquisition of word and comprehension."
पाणिनीय-सुबन्त-महा-प्रक्रिया (The 5 Stations of Nominal Derivation)
Just as Phase 2 revealed the 5 universal stages for verbs (भू ➔ भवति), Pāṇini processes all nominal stems through the exact same 5 operational stations:
Semantic intent & stem saṃjñā (`१.२.४५ अर्थवत्...`). Base: 'वाच्'.
Kāraka/Prātipadikārtha allocation (`२.३.४६ & ४.१.२`). Form: 'वाच् + सुँ'.
Tag stripping (`१.३.२ ➔ १.३.९`) & `१.३.४ तुस्माः` shield. Remainder: 'वाच् + स्'.
Stem processing under `१.४.१३`: Palatal 'c' shifts to velar 'k' (`८.२.३०`). State: 'वाक् + स्'.
Apṛkta-lopa (`६.१.६८`), word-final voicing (`८.२.३९/८.४.५५`). Living Pada: 'वाक् / वाग्'!