Pāṇini sūtras

There is not the substitution of ā for the Diphthong of the root vye when the affixes of the Perfect follow.

German Nicht aber für den Diphthongen in vyā (vye) im Perfect. (46)

1. naन

   Part	Lexeme	Sandhi form	Meaning	Stem
   nन्	naन	naन	not	naन

2. vyaḥव्यः

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   vव्	vyāव्या	vyaḥव्यः	vye	vyव्य् + plus aḥअः

3. liṭiलिटि

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   lल्	liṭलिट्	liṭiलिटि	perfect	liṭलिट् + plus iइ

Anuvṛtti

1. upadeśeउपदेशे 6·1·45

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   uउ	upadeśaउपदेश	upadeśeउपदेशे	linguistics	upadeśउपदेश् + plus eए