8.3.50
कःकरत्करतिकृधिकृतेष्वनदितेः
Operational rule vidhi
The विसर्ग is changed to स् in the छन्दस् (Vedas) before 1. कः 2. करत् 3. करति 4. कृधि and 5. कृतः but not so in the विसर्ग of अदितिः.
Word by word (padaccheda)
Right context कः- करत्- करति- कृधि- saptamī · bahuvacanaTarget अनदितेः 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. Hover or tap one to see its card.
Full reading
कः-
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
The विसर्ग is changed to स् in the छन्दस् (Vedas) before 1. कः 2. करत् 3. करति 4. कृधि and 5. कृतः but not so in the विसर्ग of अदितिः।
Thus विश्वतस्कः ॥ कः is the Aorist of कृ, the च्वि has been elided by 2.4.80: the ऋ of कृ is gunated before the affix तिप्, thus we have कर्त्, the त् is elided by 6.1.68; and the augment अट् is not added by 6.4.75. Similarly विश्वतस्करत् ॥ Here also करत् is the Aorist of कृ, with अङ् by 3.1.59. पयस्करति, here करति is the लट् of कृ; शप् is added instead of उ, as a Vedic anomaly. उरणस्कृधि, here कृधि is the imperative of कृ, the सि is changed to हि, the vikarana is elided, and हि changed to धि by 6.4.102. See 8.4.27, for the change of न to ण ॥ सदस्कृतम्, here कृतम् is Past Participle of कृ ॥
Why do we say 'but not of अदितिः'? Observe यथा नो अदितिः करत् (Rig. I.43.2).
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.