6.2.163
संख्यायाः स्तनः
Operational rule vidhi
In a बहुव्रीहि समास , after a numeral the word स्तन has acute accent (उदात्त) on the final.
Word by word (padaccheda)
Target संख्यायाः ṣaṣṭhī · ekavacanaSubstitute / term स्तनः prathamā · ekavacana
- Target Ṣaṣṭhī (6th case): names what gets replaced, "in place of X" (1.1.49 षष्ठी स्थानेयोगा).
- Substitute / term Prathamā (1st case): in operational rules, the substitute or the thing introduced; in definitions, the term or its referent.
Full reading
संख्यायाः स्तनः
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
संख्यायाः → स्तनः
Replace saṃkhyāyāḥ with stanaḥ. Inherited words (anuvṛtti) may add further conditions.
Commentary
In a बहुव्रीहि समास , after a numeral the word स्तन has acute accent (उदात्त) on the final.
Thus द्विस्तना꣡, त्रिस्तना꣡, चतुःस्तनाः꣡ ॥ Why do we say after a Numeral ? Observe दशनायस्तना ॥ Why do we say 'स्तन'? Observe द्विशिराः ॥
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.