7.4.5
तिष्ठतेरित्
Operational rule vidhi
Short इ is substituted for the penultimate vowel of the Causative अङ्ग (stem) स्था in the Aorist.
Word by word (padaccheda)
Target तिष्ठतेः ṣaṣṭhī · ekavacanaSubstitute / term 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
तिष्ठतेः
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
तिष्ठतेः →
Replace tiṣṭhateḥ with it. Inherited words (anuvṛtti) may add further conditions.
Commentary
Short इ is substituted for the penultimate vowel of the Causative अङ्ग (stem) स्था in the Aorist.
Thus अतिष्ठिपत्, अतिष्ठिपताम्, and अतिष्ठिपन् ॥ The form is thus evolved. स्था + णिच् + अत् = स्थाप् + इ + अत् 7.3.36 = स्थाप् + अत् 6.4.51 = स्थिप् + अत् 7.4.5 = तिष्ठिपत् ॥
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.