Pāṇini sūtras

A word which has one fixed case, (while the word compounded with it may vary its case) is also upasarjana, except for the purposes of the rule which requires the upasarjana to stand first in a compound.

German So heisst auch derjenige Theil eines Compositums, der stets als in demselben Casus stehend gedacht wird, aber mit der Beschränkung, dass in einem solchen Fall das Upasarjana nicht vorangeht. (44)

1. eka+vibhaktiएक+विभक्ति

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   eए	ekaएक	ekaएक	same	ekaएक
   vव्	vibhaktiविभक्ति	vibhaktiविभक्ति	case	vibhaktविभक्त् + plus iइ

2. caच

   Part	Lexeme	Sandhi form	Meaning	Stem
   cच्	caच	caच	besides	caच

3. a+pūrva+nipāteअ+पूर्व+निपाते

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   aअ	aअ	aअ	not	aअ
   pप्	pūrvaपूर्व	pūrvaपूर्व	antecedent	pūrvaपूर्व
   nन्	nipātaनिपात	nipāteनिपाते	upasarjana	nipātनिपात् + plus eए

Anuvṛtti

1. upasarjanamउपसर्जनम् 1·2·43

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   uउ	upasarjanaउपसर्जन	upasarjanamउपसर्जनम्	upasarjanaउपसर्जन	upasarjanउपसर्जन् + plus amअम्