7.3.92
तृणह इम्
Operational rule vidhi
Before a पित् सार्वधातुक affix beginning with a consonant, इ is added after अ of the verbal stem तृणह्.
Word by word (padaccheda)
Target तृणहः ṣaṣṭhī · ekavacanaSubstitute / term इम् prathamā · ekavacana
- Target Ṣaṣṭhī (6th case): names what gets replaced, "in place of X" (1.1.49 षष्ठी स्थानेयोगा).
- Substitute / term Prathamā (1st case): in operational rules, the substitute or the thing introduced; in definitions, the term or its referent.
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
तृणहः इम्
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
तृणहः → इम्
Replace tṛṇahaḥ with im. Inherited words (anuvṛtti) may add further conditions.
Commentary
Before a पित् सार्वधातुक affix beginning with a consonant, इ is added after अ of the verbal stem तृणह्।
As तृणेढि, तृणेक्षि, तृणेह्मि, अतृणेट् ॥ In the last example though the affix vanishes altogether, yet it produces its effect. Why beginning with a consonant? Observe तृणहानि ॥ Why a पित् affix? Observe तृण्ढः with तस् ॥ The stem तृणह is formed from the root तृह् (Rudhadi) with the vikarana श्नम्, and is so exhibited in the sutra in order to indicate that the augment इम् is added after the vikarana श्नम् has been added, and that the root तृह् of Tudadi class is not to be taken.
The above forms are thus derived:-
तृह् + श्नम् + तिप् = तृणह् + इम् + ति = तृणइह + ति = तृणेह् + ति 6.1.87 = तृणेढ् + ति 8.2.31 = तृणेढ् + धि 8.2.40 = तृणेढ् + ढि 8.4.41 = तृणेढि with the elision of one ढ 8.3.13. The form तृणेक्षि is similarly formed by 8.2.41, the ढ् being changed to क before सि of सिप् ॥ अतृणेट् is the लङ् 2nd and 3rd Person Singular.
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.