Pāṇini sūtras

So also, after the word ‘mātṛṣvasṛ’ the affix ‘chaṇ’ is added, and the final is elided when ‘ḍhak’ follows, in forming patronymics.

1. mātṛṣvasuḥमातृष्वसुः

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   mम्	mātṛ̉मातृ̉	mātṛṣvasuḥमातृष्वसुः	mātṛṣvasṛ [word]मातृष्वसृ [wओर्द्]	mātṛṣvasमातृष्वस् + plus uḥउः

2. caच

   Part	Lexeme	Sandhi form	Meaning	Stem
   cच्	caच	caच	besides	caच

Anuvṛtti

1. apatyamअपत्यम् 4·1·92

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   aअ	apatyaअपत्य	apatyamअपत्यम्	child	apatyअपत्य् + plus amअम्

2. pitṛṣvasuḥपितृष्वसुः 4·1·132

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   pप्	pitṛṣvasपितृष्वस्	pitṛṣvasuḥपितृष्वसुः	pitṛṣvasṛ [word]पितृष्वसृ [wओर्द्]	pitṛṣvasपितृष्वस् + plus uḥउः

3. lopaḥलोपः 4·1·133

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