Pāṇini sūtras

i is substituted for the final u or ū of a reduplicate, before a labial, a semi-vowel and before j, when a or ā follows these consonants, in the Desiderative.

1. oḥओः

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   oओ	uउ	oḥओः	ukāraउकार	uउ + plus ḥः

2. pu+ya+ṇ+ji+a+pareपु+य+ण्+जि+अ+परे

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   pप्	puपु	puपु	labial consonant	pप् + plus uउ
   yय्	yaय	yaय	yakāraयकार	yय् + plus aअ
   ṇण्	ṇण्	ṇण्	NaNअ	ṇण्
   jज्	jज्	jiजि	jakāraजकार	jज् + plus iइ
   aअ	aअ	aअ	akāraअकार	aअ
   pप्	paraपर	pareपरे	following	paraपर

Anuvṛtti

1. abhyāsasyaअभ्यासस्य 7·4·58

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   aअ	abhyāsaअभ्यास	abhyāsasyaअभ्यासस्य	reduplication	abhyāsअभ्यास् + plus asyaअस्य

2. bhṛñām+i+tभृञाम्+इ+त् 7·4·76

   Part	Lexeme	Sandhi form	Meaning	Stem
   iइ	iइ	iइ	ikāraइकार	iइ
   tत्	tत्	tत्	TT	tत्

3. sani+a+taḥसनि+अ+तः 7·4·79

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