Pāṇini sūtras

The acute accent is optionally on the first syllable when a Personal-ending, being a Sârvadhâtuka tense affix beginning with a vowel, provided that the vowel is not the augment iṭ, follows after svap &c, or after hiṁs

German Desgleichen bei svap u. s. w. und bei hiṃs vor den 6, 1, 186 genannten Suffixen, wenn sie vocalisch anlauten, aber nicht, wenn dieser Vocal das Augment i ist. (188)

1. svapa+ādi+hiṃsāmस्वप+आदि+हिंसाम्

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   sस्	svapaस्वप	svapaस्वप	svapस्वप्	svapस्वप् + plus aअ
   āआ	ādiआदि	ādiआदि	etc.	ādआद् + plus iइ
   hह्	hiṃsहिंस्	hiṃsāmहिंसाम्	hiṃsहिंस्	hiṃsहिंस् + plus āmआम्

2. a+ciअ+चि

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   aअ	aअ	aअ	akāraअकार	aअ
   cच्	cच्	ciचि	CC	cच् + plus iइ

3. an+iṭiअन्+इटि

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   aअ	naन	anअन्	not	naन
   iइ	iṭइट्	iṭiइटि	iṭइट्	iṭइट् + plus iइ

Anuvṛtti

1. udāttaḥउदात्तः 6·1·159

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   uउ	udāttaउदात्त	udāttaḥउदात्तः	udāttaउदात्त	udāttउदात्त् + plus aḥअः

2. la+sārvadhātukamल+सार्वधातुकम् 6·1·186

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   lल्	laल	laल	verbal ending	lल् + plus aअ
   sस्	sārvadhātuसार्वधातु	sārvadhātukamसार्वधातुकम्	sārvadhātukaसार्वधातुक	sārvadhātukसार्वधातुक् + plus amअम्

3. ādiḥआदिः 6·1·187

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   āआ	ādiआदि	ādiḥआदिः	first syllable	ādआद् + plus iḥइः