Pāṇini sūtras

The augment nuk (n) is added after the short a of a reduplicate in the Intensive (with or without yaṅ), when the root ends in a Nasal.

1. nukनुक्

   Part	Lexeme	Sandhi form	Meaning	Stem
   nन्	nukनुक्	nukनुक्	nukनुक्	nukनुक्

2. a+taḥअ+तः

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   aअ	aअ	aअ	akāraअकार	aअ
   tत्	tत्	taḥतः	TT	tत् + plus aḥअः

3. anunāsika+antasyaअनुनासिक+अन्तस्य

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   aअ	anunāsikaअनुनासिक	anunāsikaअनुनासिक	anunāsikaअनुनासिक	anunāsikअनुनासिक् + plus aअ
   aअ	antaअन्त	antasyaअन्तस्य	last syllable	antअन्त् + plus asyaअस्य

Anuvṛtti

1. abhyāsasyaअभ्यासस्य 7·4·58

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

2. yaṅ+lukoḥयङ्+लुकोः 7·4·82

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   yय्	yaṅयङ्	yaṅयङ्	intensive ending	yaṅयङ्
   lल्	lukलुक्	lukoḥलुकोः	suffix elision	lukलुक् + plus oḥओः