Pāṇini sūtras

The foregoing rules from VI.1.168 downwards have no applicability after go, and śvan and words ending in them; nor after a stem which before the case ending of the Nominative singular has a or ā, nor after rāj, or after a stem ending in añc, nor as well as after kruñc and kṛt

German Die 6, 1, 168 gegebene Regel findet keine Anwendung bei go und śvan, bei einsilbigen Stämmen, die im Nomin. Sg. a oder ā vor der Casusendung haben, bei rāj, bei den auf añc auslautenden Stämmen, sowie bei kruñc und kṛt. (182)

1. naन

   Part	Lexeme	Sandhi form	Meaning	Stem
   nन्	naन	naन	not	naन

Anuvṛtti

1. udāttaḥउदात्तः 6·1·159

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

2. vibhaktiḥविभक्तिः 6·1·168

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   vव्	vibhaktiविभक्ति	vibhaktiḥविभक्तिः	declension	vibhaktविभक्त् + plus iḥइः