5.1.39 गोद्व्यचोऽसंख्यापरिमाणाश्वादेर्यत्

Word by word (padaccheda)

Left context गो- द्व्यचः pañcamī · ekavacanaLeft context अ- - परिमाण- अश्वादेः pañcamī · ekavacanaSubstitute / term य prathamā · ekavacana

Left context Pañcamī (5th case): "after X", the operation applies to what follows (1.1.67 तस्मादित्युत्तरस्य). Also used for limits and sources.
Substitute / term Prathamā (1st case): in operational rules, the substitute or the thing introduced; in definitions, the term or its referent.

Dotted words are technical terms. Hover or tap one to see its card.

Pink letters are it-markers (anubandhas), tags dropped by 1.3.9. Hover or tap one for the rule that marks it, or try the it-letter finder.

Full reading

गो-द्व्यचः अ- -परिमाण-अश्वादेः यत्

Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.

Commentary

After the word गो and after a word having two syllables, with the exception of a Numeral, or a Measure of capacity or अश्व etc., the affix यत् (य) is added, in the above sense of 'a relation or a portent for the purpose of that'.
This debars ठञ्. As गो निमित्तं संयोग उत्पातो वा = ग꣡व्यः 'a connection or a portent for the sake of a cow.' So also after a word of two syllables, as, ध꣡न्यम्, स्व꣡र्ग्यम्, यशस्य॑म्, आयुष्य॑म् ॥

Why do we say "when not a word denoting a Numeral, or a Measure of capacity or अश्व &c"? Observe पंचानां निमित्तं = पंचकम्, सप्तकम्, अष्टकम्; प्रास्थिकम् खारीकम्, आश्विकः formed by 5.1.22, 5.1.18, 5.1.19.

Vart:- The word ब्रह्मवर्च्चस should be enumerated : eg. ब्रह्मवर्च्चसस्य निमित्तं गुरुणा संयोगः = ब्रह्मवर्च्चस्यम् "relationship with a teacher in order to acquire Brahmavarchasa."

1 अश्व, 2 अश्मन्, 3 गण, 4 ऊर्णा, 5 उमा, 6 गङ्गा (भङ्ग भङ्गा), 7 वर्षा (वर्ष), 8 वसु. ॥

Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.