Pāṇini sūtras

The affix vuñ comes in the remaining senses, after a vṛddha word denoting a locality, which has the letter y as its penultimate, and after a vṛddha place-name denoting a waste or desert place.

1. dhanva+ya+upadhātधन्व+य+उपधात्

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   dद्	dhanvanधन्वन्	dhanvaधन्व	desert	dhanvधन्व् + plus aअ
   yय्	yaय	yaय	yakāraयकार	yय् + plus aअ
   uउ	upadhāउपधा	upadhātउपधात्	penult	upadhउपध् + plus ātआत्

2. vuñवुञ्

   Part	Lexeme	Sandhi form	Meaning	Stem
   vव्	vuñवुञ्	vuñवुञ्	vuñवुञ्	vuñवुञ्

Anuvṛtti

1. deśeदेशे 4·2·119

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   dद्	deśaदेश	deśeदेशे	region	deśदेश् + plus eए

2. vṛddhātवृद्धात् 4·2·120

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   vव्	vṛdhवृध्	vṛddhātवृद्धात्	vṛdhवृध्	vṛddhवृद्ध् + plus ātआत्