Pāṇini sūtras

The consonant of the nominative-affix (su and its substitute am) is elided in the Vocative singular after a nominal-stem enidng in e or o or a short vowel.

German Die Nominativendung s fällt im Vocativ Sg. nach e, o und einer Kürze aus. (69)

1. e+ṅ+hrasvātए+ङ्+ह्रस्वात्

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   eए	eए	eए	ekāraएकार	eए
   ṅङ्	ṅङ्	ṅङ्	ṅakāraङकार	ṅङ्
   hह्	hrasvaह्रस्व	hrasvātह्रस्वात्	short	hrasvह्रस्व् + plus ātआत्

2. sambuddheḥसम्बुद्धेः

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   sस्	sambuddhiसम्बुद्धि	sambuddheḥसम्बुद्धेः	vocative	sambuddhसम्बुद्ध् + plus eḥएः

Anuvṛtti

1. lopaḥलोपः 6·1·66

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   lल्	lopaलोप	lopaḥलोपः	elision	lopलोप् + plus aḥअः

2. ha+l+ṅī+āpbhyaḥह+ल्+ङी+आप्भ्यः 6·1·68

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   hह्	haह	haह	hakāraहकार	hह् + plus aअ
   lल्	lल्	lल्	LL	lल्