7.4.42
दधातेर्हिः
Operational rule vidhi
हि is optionally substituted for धा (दधाति) before an affix beginning with त् and having an indicatory क् .
Word by word (padaccheda)
Target दधातेः ṣaṣṭhī · ekavacanaSubstitute / term हिः 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.
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Full reading
दधातेः हिः
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
दधातेः → हिः
Replace dadhāteḥ with hiḥ. Inherited words (anuvṛtti) may add further conditions.
Commentary
हि is optionally substituted for धा (दधाति) before an affix beginning with त् and having an indicatory क् ।
As हितः, हितवत्, हित्वा ॥
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.