Pāṇini sūtras

In a stem ending in n, the preceding vowel is lengthened in strong cases, with the exception of the Vocative singular.

German Auch in den starken Casus, mit Ausnahme des Voc. Sg. (8)

1. sarvanāmasthāneसर्वनामस्थाने

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   sस्	sarvanāmasthसर्वनामस्थ्	sarvanāmasthāneसर्वनामस्थाने	sarvanāmasthānaसर्वनामस्थान	sarvanāmasthānसर्वनामस्थान् + plus eए

2. caच

   Part	Lexeme	Sandhi form	Meaning	Stem
   cच्	caच	caच	besides	caच

3. a+sambuddhauअ+सम्बुद्धौ

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   aअ	aअ	aअ	not	aअ
   sस्	sambuddhiसम्बुद्धि	sambuddhauसम्बुद्धौ	vocative	sambuddhसम्बुद्ध् + plus auऔ

Anuvṛtti

1. na+upadhāyāḥन+उपधायाः 6·4·7

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   nन्	naन	naन	nakāraनकार	nन् + plus aअ
   uउ	upadhāउपधा	upadhāyāḥउपधायाः	penult	upadhउपध् + plus āyआय्