Pāṇini sūtras

A word, implying debt, considered as a ‘cause’ but not as a kartṛi or agent, takes the fifth case-affix.

1. a+kartari+ṛṇeअ+कर्तरि+ऋणे

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   aअ	aअ	aअ	not	aअ
   kक्	kartṛकर्तृ	kartariकर्तरि	agens	kartकर्त् + plus ariअरि
   ṛऋ	ṛṇaऋण	ṛṇeऋणे	debt	ṛṇऋण् + plus eए

2. pañcamīपञ्चमी

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   pप्	pañcamīपञ्चमी	pañcamīपञ्चमी	ablative	pañcamपञ्चम् + plus īई

Anuvṛtti

1. a+abhinihiteअ+अभिनिहिते 2·3·1

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   aअ	naन	aअ	not	naन
   aअ	abhidhāअभिधा	abhinihiteअभिनिहिते	express	abhihitअभिहित् + plus iteइते

2. hetauहेतौ 2·3·23

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   hह्	hetuहेतु	hetauहेतौ	cause	hetहेत् + plus auऔ