7.3.76
क्रमः परस्मैपदेषु
Operational rule vidhi
The long is substituted in क्रम् before a शित् affix, in the परस्मैपद .
Word by word (padaccheda)
Target क्रमः ṣaṣṭhī · ekavacanaRight context saptamī · bahuvacana
- Target Ṣaṣṭhī (6th case): names what gets replaced, "in place of X" (1.1.49 षष्ठी स्थानेयोगा).
- 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
क्रमः
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
The long is substituted in क्रम् before a शित् affix, in the परस्मैपद ।
As क्रामति, क्रामतः, क्रमन्ति ॥ Why in the Parasmaipada? Observe आक्रमते आदित्यः ॥ How do you explain the lengthening in उत्क्राम and संक्राम (Imperative 2nd Person Singular)? For when हि is elided by लुक्, 6.4.105 then by 1.1.63, the affix being dropped by a लु-elision, it would produce no effect and so there ought to have been no lengthening? This is no valid objection. The prohibition of (l. I.63), applies to the अङ्ग stem after which the affix is elided. Here क्रम् is not a stem or anga with regard to हि, but it is a stem with regard to शप्, as क्रम् + शप् + हि ॥ Therefore, though हि is elided, the lengthening will take place by 1.1.62, (प्रत्यय लक्षणम्) ॥
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.