Pāṇini sūtras

The affix vun comes, after the word pathin, being in the seventh case in construction, when the sense is “versed therein or skilled therein”.

1. tatraतत्र

   Part	Lexeme	Sandhi form	Meaning	Stem
   tत्	tatraतत्र	tatraतत्र	there	tatraतत्र

2. kuśalaḥकुशलः

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   kक्	kuśalaकुशल	kuśalaḥकुशलः	expert	kuśalकुशल् + plus aḥअः

3. pathaḥपथः

   Part	Lexeme	Sandhi form	Meaning	Stem
   pप्	pathinपथिन्	pathaḥपथः	path [word]	pathinपथिन्

Anuvṛtti

1. vunवुन् 5·2·62

   Part	Lexeme	Sandhi form	Meaning	Stem
   vव्	vunवुन्	vunवुन्	vunवुन्	vunवुन्