6.2.156
ययतोश्चातदर्थे
Operational rule vidhi
The words formed with the तद्धित affixes य and यत् when not denoting 'useful for that' have acute accent (उदात्त) on the last syllable after the particle नञ् negating the attribute.
Word by word (padaccheda)
Target ययतोः ṣaṣṭhī · dvivacanaIndeclinable च avyayaRight context अतदर्थे saptamī · ekavacana
- Target Ṣaṣṭhī (6th case): names what gets replaced, "in place of X" (1.1.49 षष्ठी स्थानेयोगा).
- Indeclinable An avyaya such as च "and", वा "optionally", न "not".
- Right context Saptamī (7th case): "when X follows", the operation applies to what precedes (1.1.66 तस्मिन्निति निर्दिष्टे पूर्वस्य). Also a condition or domain ("in the sense of").
Full reading
ययतोः च अतदर्थे
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
The words formed with the तद्धित affixes य and यत् when not denoting 'useful for that' have acute accent (उदात्त) on the last syllable after the particle नञ् negating the attribute.
Thus पाशानां समूहः = पाश्याः, न पाश्याः = अपाश्याः꣡, So also अतृण्याः꣡ ( IV. 2.49); दन्तेषु भवं = दन्त्यम्, न दन्त्यं = अदन्त्य꣡म्, अकर्ण्य꣡म् 5.1.6. Why do we say 'atadartha: not useful for that'. Observe पादार्थमुदकम् = पाद्यम्, न पाद्यम् = अ꣡पाद्यम् 5.4.25. This rule does not apply when the affixes are not Taddhita, as अदेयम् formed with the krit affix यत् ॥ There must be negation of the attribute, otherwise दन्त्यादन्यत् = अदन्त्यम् ॥ The affix य and यत्, one without any anubandha and the other with the anubandha त् being specifically mentioned, excludes all other affixes having य as their effective element, such as उप &c. 4.2.9, thus न वामदेव्यं = अ꣡वामदेव्यम् ॥ See 4.2.9.
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.