Pāṇini sūtras

The affix laṭ comes optionally after a verb, in denoting past time, in reply to an interrogation, when the words na ‘not’ and nu ‘what of that’ are in connection with it.

1. na+nvoḥन+न्वोः

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   nन्	naन	naन	na [word]	naन
   nन्	nuनु	nvoḥन्वोः	nu [word]	nन् + plus voḥवोः

2. vibhāṣāविभाषा

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   vव्	vibhāṣविभाष्	vibhāṣāविभाषा	option	vibhāṣविभाष् + plus āआ

Anuvṛtti

1. pṛṣṭa+prativacaneपृष्ट+प्रतिवचने 3·2·120

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   pप्	pṛṣ̊पृष्̊	pṛṣṭaपृष्ट	question	pṛṣṭपृष्ट् + plus aअ
   pप्	prativacanaप्रतिवचन	prativacaneप्रतिवचने	answer	prativacanप्रतिवचन् + plus eए