Pāṇini sūtras

The ha of nah is changed to dha before a jhal letter or at the end of a word.

1. nahaḥनहः

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   nन्	nahनह्	nahaḥनहः	nah [verb]	nahनह् + plus aḥअः

2. dhaḥधः

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   dद्	dhaध	dhaḥधः	dhakāraधकार	dhध् + plus aḥअः

Anuvṛtti

1. jha+liझ+लि 8·2·26

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   jज्	jhaझ	jhaझ	jhakāraझकार	jhझ् + plus aअ
   lल्	lल्	liलि	LL	lल् + plus iइ

2. caच 8·2·29

   Part	Lexeme	Sandhi form	Meaning	Stem
   cच्	caच	caच	and	caच

3. haḥहः 8·2·31

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   hह्	hह्	haḥहः	hakāraहकार	hह् + plus aḥअः

4. dhātoḥधातोः 8·2·32

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