Pāṇini sūtras

The Negative particle remains unchanged in a word which begins with eka, and of this eka, there is the augment aduk (ad).

1. eka+ādiḥएक+आदिः

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   eए	ekaएक	ekaएक	eka [word]	ekaएक
   āआ	ādiआदि	ādiḥआदिः	etc.	ādआद् + plus iḥइः

2. ca+ekasyaच+एकस्य

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   cच्	caच	caच	and	caच
   eए	ekaएक	ekasyaएकस्य	eka [word]	ekaएक + plus syaस्य

3. ca+ādukच+आदुक्

   Part	Lexeme	Sandhi form	Meaning	Stem
   cच्	caच	caच	and	caच
   āआ	ādukआदुक्	ādukआदुक्	ādukआदुक्	ādukआदुक्

Anuvṛtti

1. uttara+padeउत्तर+पदे 6·3·1

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   uउ	uttaraउत्तर	uttaraउत्तर	last	uttarउत्तर् + plus aअ
   pप्	padaपद	padeपदे	word	padपद् + plus eए

2. nañaḥनञः 6·3·73

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   nन्	nañनञ्	nañaḥनञः	nañनञ्	nañनञ् + plus aḥअः

3. prakṛtyāप्रकृत्या 6·3·75

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   pप्	prakṛtiप्रकृति	prakṛtyāप्रकृत्या	nature	prakṛtप्रकृत् + plus yāया