5.4.51
अरुर्मनश्चक्षुश्चेतोरहोरजसां लोपश्च
Operational rule vidhi
The affix च्वि comes after the words 1. अरुस् 2. मनस् 3. चक्षुस् 4. चेतस् 5. रहस् and 6. रजस् and there is elision of their final consonant.
Word by word (padaccheda)
Target अरुस्- मनस्- चक्षुस्- चेतस्- रहस्- रजसाम् ṣaṣṭhī · bahuvacanaSubstitute / term prathamā · ekavacanaIndeclinable च avyaya
- 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.
- Indeclinable An avyaya such as च "and", वा "optionally", न "not".
Dotted words are technical terms. Hover or tap one to see its card.
Full reading
अरुस्-
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
अरुस्-
Replace arus-manas-cakṣus-cetas-rahas-rajasām with lopaḥ. Inherited words (anuvṛtti) may add further conditions.
Commentary
The affix च्वि comes after the words 1. अरुस् 2. मनस् 3. चक्षुस् 4. चेतस् 5. रहस् and 6. रजस् and there is elision of their final consonant.
The affix च्वि would have come after these words by force of the last sutra which is of universal application : the present sutra is made in order to teach the elision of the consonant. Thus अनरुररुः सम्पद्यते, तं करोति = अरू करोति, अरू भवति, अरू स्यात् ॥ So also उन्मनी करोति, भवति or स्यात्, so also उच्चक्षू, विचेती, विरही, and विरजी करोति or भवति or स्यात् ॥ The short उ of अरु and चक्षु is lengthened by 7.4.26, and the अ of the other words is changed into ई by 7.4.32.
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.