6.3.124
दस्ति
Operational rule vidhi
A preposition ending in इ or उ lengthens its final before the verb दा when the latter is changed to त.
Word by word (padaccheda)
Target दः ṣaṣṭhī · ekavacanaRight context ति saptamī · ekavacana
- Target Ṣaṣṭhī (6th case): names what gets replaced, "in place of X" (1.1.49 षष्ठी स्थानेयोगा).
- 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").
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Full reading
दः ति
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
A preposition ending in इ or उ lengthens its final before the verb दा when the latter is changed to त।
Thus नीत्तम्, वीत्तम्, परीत्तम् ॥ See 7.4.47 for the change of दा to त ॥ But प्रत्तम्, अवत्तम्, where the prepositions do not end in इ or उ ॥ Why do we say 'दा is changed to त'? Observe वितीर्णम् नितीर्णम् ॥ Why do we say ति 'a substitute of दा, beginning with a त'? Observe सुदत्तम्, here दद् is the substitute of दा 7.4.46.
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.