Pāṇini sūtras

In a Tatpurusha compound, the words aṁśu &c have acute on the final when preceded by prati

1. prateḥप्रतेः

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   pप्	pratiप्रति	prateḥप्रतेः	pratiप्रति	pratप्रत् + plus eḥएः

2. aṃśu+ādayaḥअंशु+आदयः

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   aअ	aṃśuअंशु	aṃśuअंशु	aṃśu [word]अंशु [wओर्द्]	aṃśअंश् + plus uउ
   āआ	ādiआदि	ādayaḥआदयः	etc.	ādआद् + plus ayaḥअयः

3. tatpuruṣeतत्पुरुषे

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   tत्	tatpuruṣaतत्पुरुष	tatpuruṣeतत्पुरुषे	tatpuruṣaतत्पुरुष	tatpuruṣतत्पुरुष् + plus eए

Anuvṛtti

1. udāttaḥउदात्तः 6·2·64

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

2. uttara+pada+ādiḥउत्तर+पद+आदिः 6·2·111

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   uउ	uttaraउत्तर	uttaraउत्तर	last	uttarउत्तर् + plus aअ
   pप्	padaपद	padaपद	word	padपद् + plus aअ
   āआ	ādiआदि	ādiḥआदिः	first syllable	ādआद् + plus iḥइः

3. antaḥअन्तः 6·2·143

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   aअ	antaअन्त	antaḥअन्तः	last syllable	antअन्त् + plus aḥअः

4. upasargātउपसर्गात् 6·2·177

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   uउ	upasargaउपसर्ग	upasargātउपसर्गात्	preposition	upasargउपसर्ग् + plus ātआत्