सोपानम् २५: सुबन्त-प्रवेशः, प्रातिपदिक-स्वरूपम् & वागर्थाविव-मङ्गलाचरणम् (The Prātipadika Foundation)
Welcome to Phase 3 (सुबन्त-प्रक्रिया)! Beginning with Mahākavi Kālidāsa’s iconic invocatory verse वागर्थाविव सम्पृक्तौ, we discover the architecture of nominal bases (प्रातिपदिकम्) through sūtras १.२.४५ अर्थवदधातुरप्रत्ययः, १.२.४६ कृत्तद्धितसमासाश्च, and ४.१.१ ङ्याप्प्रातिपदिकात्.
महाकवि-कालिदासस्य मङ्गलाचरणम् & सुबन्त-रहस्यम्
Every classical Sanskrit work begins with a Maṅgalācaraṇa (auspicious invocation). In the opening verse of the Raghuvaṃśam, Kālidāsa weaves words that illustrate the complete harmony of verbal and nominal forms:
जगतः पितरौ वन्दे पार्वतीपरमेश्वरौ ॥
vāgarthāviva sampṛktau vāgarthapratipattaye | jagataḥ pitarau vande pārvatīparameśvarau ||
Notice that out of 7 words in this verse, only 'वन्दे' is a finite verb (तिङन्तम् via ३.१.९१ धातोः). All the other 6 words are Subantas built on Prātipadikas!
'जगतः' is the direct 6.1 Genitive of the pure consonant stem 'जगत्'. As Pt. Jijñāsu points out, Halanta stems reveal the pure Sup affixes with zero distortion.
Compounds like 'वागर्थौ' and 'पार्वतीपरमेश्वरौ' regain single Prātipadika status under १.२.४६ कृत्तद्धितसमासाश्च to take external dual endings.