6.1.55
प्रजने वीयतेः
Operational rule vidhi
There is optionally the substitution of आ in the room of the diphthong of the root वी in the causative, when meaning 'to conceive an embryo'.
Word by word (padaccheda)
Right context प्रजने saptamī · ekavacanaTarget वीयतेः ṣaṣṭhī · ekavacana
- 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").
- Target Ṣaṣṭhī (6th case): names what gets replaced, "in place of X" (1.1.49 षष्ठी स्थानेयोगा).
Dotted words are technical terms, dashed ones pratyāhāras (names for classes of sounds or affixes). Hover or tap one to see its card.
Full reading
प्रजने वीयतेः
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
There is optionally the substitution of आ in the room of the diphthong of the root वी in the causative, when meaning 'to conceive an embryo'.
The root वी Adadi 39 means 'to go, to conceive, to shine, to eat, and to desire'. The substitution takes place when it means 'to impregnate or conceive'. Thus पुरो वानो गाः प्रवापयति or प्रवाययति = गर्भे ग्राहयति ॥ The word प्रजन means the receiving of the embryo which in course of time will lead to the birth of a child.
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.