Pāṇini sūtras

In a Bahuvrûhi compound, the word karṇa standing as second member, has acute on the first syllable, when it is preceded by a word denoting color or mark.

1. karṇaḥकर्णः

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   kक्	karṇaकर्ण	karṇaḥकर्णः	karṇa [word]कर्ण [wओर्द्]	karṇकर्ण् + plus aḥअः

2. varṇa+lakṣaṇātवर्ण+लक्षणात्

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   vव्	varṇaवर्ण	varṇaवर्ण	color	varṇवर्ण् + plus aअ
   lल्	lakṣaṇaलक्षण	lakṣaṇātलक्षणात्	mark	lakṣaṇलक्षण् + plus ātआत्

Anuvṛtti

1. udāttaḥउदात्तः 6·2·64

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

2. bahuvrīhauबहुव्रीहौ 6·2·106

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   bब्	bahuvrīhiबहुव्रीहि	bahuvrīhauबहुव्रीहौ	bahuvrīhiबहुव्रीहि	bahuvrīhबहुव्रीह् + plus auऔ

3. 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