Pāṇini sūtras

In the Parasmaipada s-Aorist there is Vṛiddhi of the a of vad, vraj, and of any vowel, without distinction, of the stems ending in a consonant.

1. vada+vraja+ha+l+antasyaवद+व्रज+ह+ल्+अन्तस्य

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   vव्	vadaवद	vadaवद	vadवद्	vadवद् + plus aअ
   vव्	vrajaव्रज	vrajaव्रज	vrajव्रज्	vrajव्रज् + plus aअ
   hह्	haह	haह	hakāraहकार	hह् + plus aअ
   lल्	lल्	lल्	LL	lल्
   aअ	antaअन्त	antasyaअन्तस्य	last syllable	antअन्त् + plus asyaअस्य

2. a+caḥअ+चः

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   aअ	aअ	aअ	akāraअकार	aअ
   cच्	cच्	caḥचः	CC	cच् + plus aḥअः

Anuvṛtti

1. parasmaipadeṣuपरस्मैपदेषु 7·2·1

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   pप्	parasmaipadaपरस्मैपद	parasmaipadeṣuपरस्मैपदेषु	active voice	parasmaipadपरस्मैपद् + plus eṣuएषु