Pāṇini sūtras

is is substituted for the root-vowel of mī, mi, dā and dhā (ghu), rabh, labh, śak, pat and pad when the Desiderative san beginning with s (i. e. not taking the augment i) follows.

1. saniसनि

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   sस्	sanसन्	saniसनि	desiderative ending	sanसन् + plus iइ

2. mī+mā+ghu+rabha+labha+śaka+pata+padāmमी+मा+घु+रभ+लभ+शक+पत+पदाम्

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   mम्	mīमी	mīमी	mīमी	mम् + plus īई
   mम्	māमा	māमा	māमा	mम् + plus āआ
   gग्	ghuघु	ghuघु	ghuघु	ghघ् + plus uउ
   rर्	rabhaरभ	rabhaरभ	rabhरभ्	rabhरभ् + plus aअ
   lल्	labhaलभ	labhaलभ	labhलभ्	labhलभ् + plus aअ
   śश्	śakaशक	śakaशक	śakशक्	śakशक् + plus aअ
   pप्	pataपत	pataपत	patपत्	patपत् + plus aअ
   pप्	padपद्	padāmपदाम्	padपद्	padपद् + plus āmआम्

3. a+caḥअ+चः

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

4. isइस्

   Part	Lexeme	Sandhi form	Meaning	Stem
   iइ	isइस्	isइस्	isइस्	isइस्

Anuvṛtti

1. siसि 7·4·49

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   sस्	sस्	siसि	sakāraसकार	sस् + plus iइ