Pāṇini sūtras

The affixes āya and those that follow it, (i.e. āya, īyaṅ and ṇiṅ) are optionally added, when it is desired to express one’s self with an ârdhadhâtuka affix.

1. āya+ādayaḥआय+आदयः

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   āआ	āyaआय	āyaआय	āyaआय	āyआय् + plus aअ
   āआ	ādiआदि	ādayaḥआदयः	etc.	ādआद् + plus ayaḥअयः

2. ārdhadhātukeआर्धधातुके

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   āआ	ārdhadhātuआर्धधातु	ārdhadhātukeआर्धधातुके	ārdhadhātukaआर्धधातुक	ārdhadhātukआर्धधातुक् + plus eए

3. vāवा

   Part	Lexeme	Sandhi form	Meaning	Stem
   vव्	vāवा	vāवा	optionally	vāवा

Anuvṛtti

1. dhātoḥधातोः 3·1·22

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   dद्	dhātuधातु	dhātoḥधातोः	Sanskrit verbal root	dhātधात् + plus oḥओः