3.4.86
एरुः
Operational rule vidhi
The इकार present in the प्रत्ययाs of लोट्लकार is converted to उकार.
Word by word (padaccheda)
Target एः ṣaṣṭhī · ekavacanaSubstitute / term उः 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. Hover or tap one to see its card.
Full reading
एः उः
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
एः → उः
Replace eḥ with uḥ. Inherited words (anuvṛtti) may add further conditions.
Commentary
In the लोट् (Imperative Mood) उ is the substitute of इ।
Thus ति becomes तु, अन्ति becomes अन्तु, as have already been given in the above table.
Vart:- Prohibition must be stated in the case of affixes हि and नि of लोट् । In the case of these two affixes, the इ is not changed into उ, either because they have been so taught in the sutras, or because the वा of sutra 3.4.83 is understood here also and makes this rule an optional rule of limited scope as in the last sutra (व्यवस्थित विभाषा). Thus पचतु, पचन्तु ।
In fact, this sutra is confined to ति and झि only and does not apply to सि to which the next sutra applies.
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.