Pāṇini sūtras

In denoting the agent (I.4.54) or the instrument (I.4.42), the third case-affix is employed.

1. kartṛ+karaṇayoḥकर्तृ+करणयोः

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   kक्	kartṛकर्तृ	kartṛकर्तृ	agens	kartकर्त् + plus ṛऋ
   kक्	karaṇaकरण	karaṇayoḥकरणयोः	instrument	karaṇकरण् + plus ayoḥअयोः

2. tṛtīyāतृतीया

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   tत्	tṛtīyतृतीय्	tṛtīyāतृतीया	instrumental	tṛtīyतृतीय् + plus āआ

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