Pāṇini sūtras

The last vowel, with consonant, if any, that follows it, is elided when the affixes iṣṭha, iman and īyas follow.

German Vor den genannten Suffixen fällt (in der Regel) der letzte Vocal mit dem etwa darauf folgenden Consonanten ab. (155)

1. ṭeḥटेः

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   ṭट्	ṭiटि	ṭeḥटेः	ṭiटि	ṭट् + plus eḥएः

Anuvṛtti

1. bhātभात् 6·4·22

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   bब्	bhaभ	bhātभात्	bhaभ	bhभ् + plus ātआत्

2. bhasyaभस्य 6·4·129

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   bब्	bhaभ	bhasyaभस्य	bhaभ	bhभ् + plus asyaअस्य

3. lopaḥलोपः 6·4·147

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

4. iṣṭha+ima+īyassuइष्ठ+इम+ईयस्सु 6·4·154

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   iइ	iṣṭhanइष्ठन्	iṣṭhaइष्ठ	iṣṭhanइष्ठन्	iṣṭhइष्ठ् + plus aअ
   iइ	imanइमन्	imaइम	imanic	imइम् + plus aअ
   īई	īyasईयस्	īyassuईयस्सु	īyasunईयसुन्	īyasईयस् + plus suसु