6.4.28
स्यदो जवे
Operational rule vidhi
The word स्यद् is formed by घञ् in the sense of 'speed'.
Word by word (padaccheda)
Substitute / term स्यदः prathamā · ekavacanaRight context जवे saptamī · ekavacana
- Substitute / term Prathamā (1st case): in operational rules, the substitute or the thing introduced; in definitions, the term or its referent.
- 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
स्यदः जवे
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
The word स्यद् is formed by घञ् in the sense of 'speed'.
This word is derived from स्यन्द, the nasal is elided, and the Vriddhi prohibited irregularly. Though the ardhadhatuka affix घञ् causes here the elision of a portion of the root, viz of न् of स्यन्द्, yet rule 1.1.4 does not apply here. That rule prohibits Guna and Vriddhi, only in case of इक् vowels, here the Vriddhi is prevented with regard to अ ॥ The prevention of this Vriddhi is irregular and not governed by 1.1.4. Thus गोस्यदः अश्वस्यदः meaning "cow-speed," "horse-speed." but तैलस्यन्दः, and घृतस्यन्दः meaning "dripping of oil or ghee".
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.