Pāṇini sūtras

The participial affixes after roots having an indicatory ā, may optionally take the augment iṭ, when the affixes have an Impersonal sense, or denote the beginning of an action.

1. vibhāṣāविभाषा

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

2. bhāva+ādi+karmaṇoḥभाव+आदि+कर्मणोः

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   bब्	bhāvaभाव	bhāvaभाव	impersonal verb	bhāvभाव् + plus aअ
   āआ	ādiआदि	ādiआदि	beginning	ādआद् + plus iइ
   kक्	karmanकर्मन्	karmaṇoḥकर्मणोः	action	karmकर्म् + plus aṇo&अणो&

Anuvṛtti

1. na+iṭन+इट् 7·2·8

   Part	Lexeme	Sandhi form	Meaning	Stem
   nन्	naन	naन	not	naन
   iइ	iṭइट्	iṭइट्	iṭइट्	iṭइट्

2. niṣṭhāyāmनिष्ठायाम् 7·2·14

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   nन्	niṣṭhनिष्ठ्	niṣṭhāyāmनिष्ठायाम्	niṣṭhāनिष्ठा	niṣṭhनिष्ठ् + plus āyआय्

3. ā+t+itaḥआ+त्+इतः 7·2·16

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   āआ	āआ	āआ	ākāraआकार	āआ
   tत्	tत्	tत्	TT	tत्
   iइ	itइत्	itaḥइतः	itइत्	itइत् + plus aḥअः