7.3.87
नाभ्यस्तस्याचि पिति सार्वधातुके
Operational rule vidhi
The गुण is not substituted for the penultimate light इक् vowel in the reduplicated form of a root, before a सार्वधातुक affix beginning with a vowel and having an indicatory प्.
Word by word (padaccheda)
Indeclinable न avyayaTarget ṣaṣṭhī · ekavacanaRight context saptamī · ekavacanaRight context पिति saptamī · ekavacanaRight context saptamī · ekavacana
- Indeclinable An avyaya such as च "and", वा "optionally", न "not".
- 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").
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
न पिति
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
The गुण is not substituted for the penultimate light इक् vowel in the reduplicated form of a root, before a सार्वधातुक affix beginning with a vowel and having an indicatory प्।
As नेनिजानि, अनेनिजम्; परिवेविषाणि, पर्यवेविषम् ॥ Why of a reduplicated root? Observe वेदानि ॥ Why beginning with a vowel ? Observe नेनेक्ति ॥ The word पित् is read here for the sake of the subsequent sutras like 7.3.92. For here in cases other than पित्, guna will be prevented by ङित् because of सार्वधातुकमपित् ॥ Why a sarvadhatuka affix? Observe नेनेज in the Perfect, the affixes of which are ardhadhatuka 3.4.115. Why do we say a penultimate light vowel? Observe जुहुवानि, अजुहवम् ॥
Vart:- There is diversity in the Vedas. As जुजोषत् the लेट् of जुस् ॥
The forms पश्पशात, चाकशीति, वावशीति, वावसीतीः are irregular. स्पश् + लेट् = स्पश् + आट् + ते = स्पश् + शप्श्लु+ आते = पस्पशाते ॥
The above forms are thus evolved. 1. ने निजानि is लोट् (Imperative Ist Person Singular), the मि is changed to नि, the augment आट् is added which is पित् (आडुत्तमस्य पिच्च 3.4.92), श्लु is substituted for शप्, then there is reduplication, then guna by 7.4.75. 2. अनानजम् is लङ्, the मिप् is changed to अम् ॥ 3. ददानि is Ist Person Singular Imperative of विद् ॥ 4. ननाक्त is 3rd person singular of the Present. 5. निनज is the Perfect with णल् which is ardhadhtuka 3.4.115. 6. जुजोषत् is the लट् of जुषी प्रीतिसेवनयोः (Tudadi 8), in the Parasmaipada, the इ of तिप् is elided 3.4.97, then is added the augment अट् 3.4.94 then शप् is irregularly replaced by श्लु, then reduplication.
In the words पस्पशाते &c. the reduplicate has been shortened, as a Vedic form, in the Intensive यङ् लुक्॥ चाकशीत is from काशृदीप्तौ there is (यङ् लुक्, लट्, तिप्, and इट् augment by यङा वा 7.3.94. वावशीतीः is from वाशृदीप्तौ, in the Intensive (यङलुक्), लट्, शत्, ङीप् and शस् i. e. it is the Accusative plural of the Feminine Present Participle from the Intensive root of वाश् ॥ The reading in the Kasika is वावशीति ॥ In these two काश् and वाश् the roots have been shortened. Or the above forms may be derived regularly, without shortening, from the roots कश् and वश् ॥
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.