7.4.67
द्युतिस्वाप्योः सम्प्रसारणम्
Operational rule vidhi
There is vocalisation of the half-vowel of the reduplicate of द्युत् and स्वापि (Causative of स्वप्).
Word by word (padaccheda)
Target द्युतिस्वाप्योः ṣaṣṭhī · dvivacanaSubstitute / 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
द्युतिस्वाप्योः
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
द्युतिस्वाप्योः →
Replace dyutisvāpyoḥ with samprasāraṇam. Inherited words (anuvṛtti) may add further conditions.
Commentary
There is vocalisation of the half-vowel of the reduplicate of द्युत् and स्वापि (Causative of स्वप्).
As वि विद्युतत्, वि विद्योतिषते, वि विद्युतिषते, 1.2.26 वि देद्युत्यते ॥ स्वापि-सुष्वापयिषति ॥ The Causative of स्वप् is taken here, and the vocalisation takes place then only, when it is immediately followed by an affix which causes reduplication. Therefore not here, स्वापि + ण्वुल् = स्वापकः; स्वापक + क्यच् = स्वापकीय, स्वापकीय + सन् = सिष्वापकीयिषति ॥
The simple root स्वप् will get vocalised in its reduplicate by 6.1.15, 6.1.17 in the Perfect. The Desiderative of स्वप् is कित् by 1.2.8, and therefore the reduplicate of स्वप् will be vocalised before सन् by 6.1.15. The reduplicate of स्वप् will be vocalised in the Intensive also by 6.1.19.
Quere:- Does the reduplicate of the Desiderative of the Denominative verb द्योतकीयति get vocalised or not.
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.