Pāṇini sūtras

For danta is substituted dat in a Bahuvrûhi, when a Numeral or su precedes it, and the whole word expresses a stage of life i. e. an age.

1. vayasiवयसि

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   vव्	vayasवयस्	vayasiवयसि	age	vayवय् + plus asiअसि

2. dantasyaदन्तस्य

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   dद्	dantaदन्त	dantasyaदन्तस्य	danta [word]	dantदन्त् + plus asyaअस्य

3. datṛदतृ

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   dद्	datṛदतृ	datṛदतृ	datṛदतृ	datदत् + plus ṛऋ

Anuvṛtti

1. samāsa+antāḥसमास+अन्ताः 5·4·68

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   sस्	samāsaसमास	samāsaसमास	Sanskrit compound	samāsसमास् + plus aअ
   aअ	antaअन्त	antāḥअन्ताः	end	antअन्त् + plus āMआM

2. bahuvrīhauबहुव्रीहौ 5·4·113

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   bब्	bahuvrīhiबहुव्रीहि	bahuvrīhauबहुव्रीहौ	bahuvrīhiबहुव्रीहि	bahuvrīhबहुव्रीह् + plus auऔ

3. saṅkhyā+su+pūrvasyaसङ्ख्या+सु+पूर्वस्य 5·4·140

   Part	Lexeme	Sandhi form	Meaning	Stem + termination
   sस्	saṃkhyāसंख्या	saṅkhyāसङ्ख्या	numeral	saṃkhyसंख्य् + plus āआ
   sस्	suसु	suसु	suसु	suसु
   pप्	pūrvaपूर्व	pūrvasyaपूर्वस्य	antecedent	pūrvaपूर्व + plus syaस्य