Pāṇini sūtras

Optionally when the compound denotes a condition or an instrument, the na of pāna is changed into ṇa, when it is a second member, the cause of change occurring in the first member in a compound.

1. vāवा

   Part	Lexeme	Sandhi form	Meaning	Stem
   vव्	vāवा	vāवा	optionally	vāवा

2. bhāva+karaṇayoḥभाव+करणयोः

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   bब्	bhāvaभाव	bhāvaभाव	condition	bhāvभाव् + plus aअ
   kक्	karaṇaकरण	karaṇayoḥकरणयोः	instrument	karaṇकरण् + plus ayoḥअयोः

Anuvṛtti

1. ra+ṣābhyāmर+षाभ्याम् 8·4·1

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   rर्	raर	raर	rakāraरकार	rर् + plus aअ
   ṣष्	ṣaष	ṣābhyāmषाभ्याम्	ṣakāraषकार	ṣष् + plus ābhy&आभ्य्&

2. a+ṭ+ku+pu+āṅ+num+vyavāyeअ+ट्+कु+पु+आङ्+नुम्+व्यवाये 8·4·2

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   aअ	aअ	aअ	akāraअकार	aअ
   ṭट्	ṭट्	ṭट्	ṬṬ	ṭट्
   kक्	kuकु	kuकु	guttural	kक् + plus uउ
   pप्	puपु	puपु	labial consonant	pप् + plus uउ
   āआ	āṅआङ्	āṅआङ्	āआ	āṅआङ्
   nन्	numनुम्	numनुम्	numनुम्	numनुम्
   vव्	vyavāyaव्यवाय	vyavāyeव्यवाये	interposition	vyavāyव्यवाय् + plus eए

3. pānamपानम् 8·4·9

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   pप्	pānaपान	pānamपानम्	pāna [word]पान [wओर्द्]	pānपान् + plus amअम्

4. pūrva+padātपूर्व+पदात् 8·4·3

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   pप्	pūrvaपूर्व	pūrvaपूर्व	antecedent	pūrvaपूर्व
   pप्	padaपद	padātपदात्	word	padपद् + plus ātआत्