Pāṇini sūtras

The Numeral word, standing as the first member of a Dvandva compound, preserves its accent.

1. saṅkhyāसङ्ख्या

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   sस्	saṃkhyāसंख्या	saṅkhyāसङ्ख्या	numeral	saṃkhyसंख्य् + plus āआ

Anuvṛtti

1. pūrva+padamपूर्व+पदम् 6·2·1

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   pप्	pūrvaपूर्व	pūrvaपूर्व	antecedent	pūrvaपूर्व
   pप्	padaपद	padamपदम्	word	padपद् + plus amअम्

2. rājanya+bahuvacana+dvandveराजन्य+बहुवचन+द्वन्द्वे 6·2·34

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   dद्	dvaṃdvaद्वंद्व	dvandveद्वन्द्वे	DvaṃdvaDवंद्व	dvaṃdvद्वंद्व् + plus eए