Pāṇini sūtras

A word formed with the krit affix ac and ka, preceded by the particle nañ, has acute on the final, when the meaning is ‘not capable.’

1. ac+kauअच्+कौ

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   aअ	acअच्	acअच्	aCअC	acअच्
   kक्	kaक	kauकौ	KaKअ	kक् + plus auऔ

2. aśaktauअशक्तौ

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   aअ	aśaktiअशक्ति	aśaktauअशक्तौ	inability	aśaktअशक्त् + plus auऔ

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. nañaḥनञः 6·2·155

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   nन्	nañनञ्	nañaḥनञः	nañनञ्	nañनञ् + plus aḥअः