Pāṇini sūtras

In a Tatpurusha, the words of two syllables and ajina have acute on the final when preceded by upa, but not when they are gaura and the rest.

1. upātउपात्

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   uउ	upaउप	upātउपात्	upaउप	upउप् + plus ātआत्

2. dvi+a+c+ajinamद्वि+अ+च्+अजिनम्

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   dद्	dviद्वि	dviद्वि	two	dviद्वि
   aअ	aअ	aअ	akāraअकार	aअ
   cच्	cच्	cच्	CC	cच्
   aअ	ajinaअजिन	ajinamअजिनम्	ajina [word]	ajinअजिन् + plus amअम्

3. a+gaura+ādayaḥअ+गौर+आदयः

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   aअ	aअ	aअ	not	aअ
   gग्	gauraगौर	gauraगौर	gaura [word]	gaurगौर् + plus aअ
   āआ	ādiआदि	ādayaḥआदयः	etc.	ādआद् + plus ayaḥअयः

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

5. tatpuruṣeतत्पुरुषे 6·2·193

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