Pāṇini sūtras

A Dvandva compound, denoting an approximate number of concrete substances, is optionally singular.

1. vibhāṣāविभाषा

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   vव्	vibhāṣविभाष्	vibhāṣāविभाषा	option	vibhāṣविभाष् + plus āआ

2. samīpeसमीपे

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   sस्	samīpaसमीप	samīpeसमीपे	proximity	samīpसमीप् + plus eए

Anuvṛtti

1. ekavacanamएकवचनम् 2·4·1

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   eए	ekavacanaएकवचन	ekavacanamएकवचनम्	singular	ekavacanएकवचन् + plus amअम्

2. dvandvaḥद्वन्द्वः 2·4·2

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   dद्	dvaṃdvaद्वंद्व	dvandvaḥद्वन्द्वः	DvaṃdvaDवंद्व	dvaṃdvद्वंद्व् + plus aḥअः

3. adhikaraṇa+etāvattveअधिकरण+एतावत्त्वे 2·4·15

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   aअ	adhikaraṇaअधिकरण	adhikaraṇaअधिकरण	substance	adhikaraṇअधिकरण् + plus aअ
   eए	etāvattvaएतावत्त्व	etāvattveएतावत्त्वे	measure	etāvattvएतावत्त्व् + plus eए