Pāṇini sūtras

And śṛ is the substitute of śru, and there is the affix śnu after it, when a sârvadhâtuka affix denoting an agent, follows.

1. śruvaḥश्रुवः

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   śश्	śruश्रु	śruvaḥश्रुवः	śruश्रु	śrश्र् + plus uvaḥउवः

2. śṛशृ

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   śश्	śṛशृ	śṛशृ	śṛशृ	śश् + plus ṛऋ

3. caच

   Part	Lexeme	Sandhi form	Meaning	Stem
   cच्	caच	caच	besides	caच

Anuvṛtti

1. dhātoḥधातोः 3·1·22

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   dद्	dhātuधातु	dhātoḥधातोः	Sanskrit verbal root	dhātधात् + plus oḥओः

2. sārvadhātukeसार्वधातुके 3·1·67

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   sस्	sārvadhātuसार्वधातु	sārvadhātukeसार्वधातुके	sārvadhātukaसार्वधातुक	sārvadhātukसार्वधातुक् + plus eए

3. kartariकर्तरि 3·1·68

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   kक्	kartṛकर्तृ	kartariकर्तरि	agens	kartकर्त् + plus ariअरि

4. śnuḥश्नुः 3·1·73

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   śश्	śnuश्नु	śnuḥश्नुः	śnuश्नु	śnश्न् + plus uḥउः