Pāṇini sūtras

The word ending with the first case-affix, in the sense of addressing, is called Amantrita or vocative (VIII.2.78).

1. sā+āmantritamसा+आमन्त्रितम्

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   sस्	tadतद्	sāसा	this	tadतद्
   āआ	āmantritaआमन्त्रित	āmantritamआमन्त्रितम्	vocative	āmantritआमन्त्रित् + plus amअम्

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. prathamāप्रथमा 2·3·46

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   pप्	prathamāप्रथमा	prathamāप्रथमा	nominative	prathamप्रथम् + plus āआ

3. caच 2·3·47

   Part	Lexeme	Sandhi form	Meaning	Stem
   cच्	caच	caच	besides	caच