Pāṇini sūtras

After ṭu final in a Pada, the change of a dental (stu) to a cerebral (ṣṭu), does not take place, except in the case of the affix nām

1. naन

   Part	Lexeme	Sandhi form	Meaning	Stem
   nन्	naन	naन	not	naन

2. pada+antātपद+अन्तात्

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   pप्	padaपद	padaपद	word	padपद् + plus aअ
   aअ	antaअन्त	antātअन्तात्	last syllable	antअन्त् + plus ātआत्

3. ṭoḥटोः

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   ṭट्	ṭuटु	ṭoḥटोः	cerebral consonant	ṭट् + plus oḥओः

4. a+nāmअ+नाम्

   Part	Lexeme	Sandhi form	Meaning	Stem
   aअ	aअ	aअ	not	aअ
   nन्	nāmनाम्	nāmनाम्	nāmनाम्	nāmनाम्

Anuvṛtti

1. s+toḥस्+तोः 8·4·40

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   sस्	sस्	sस्	sakāraसकार	sस्
   tत्	tuतु	toḥतोः	alveolar consonant	tत् + plus oḥओः

2. ṣ+ṭuḥष्+टुः 8·4·41

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   ṣष्	ṣष्	ṣष्	ṣakāraषकार	ṣष्
   ṭट्	ṭuटु	ṭuḥटुः	cerebral consonant	ṭट् + plus uḥउः