पथ्यतिथिवसतिस्वपतेर्ढञ्

Operational rule vidhi

The affix ठञ् comes in the sense of 'excellent with regard thereto' after the words 1. पथि 2. अतिथि 3. वसति and 4. स्वपति.

Word by word (padaccheda)

Left context पथि- अतिथि- वसति- स्वपतेः pañcamī · ekavacanaSubstitute / term prathamā · ekavacana

Left context Pañcamī (5th case): "after X", the operation applies to what follows (1.1.67 तस्मादित्युत्तरस्य). Also used for limits and sources.
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.

Pink letters are it-markers (anubandhas), tags dropped by 1.3.9. Hover or tap one for the rule that marks it, or try the it-letter finder.

Full reading

पथि-अतिथि-वसति-स्वपतेः ढञ्

Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.

Commentary

The affix ठञ् comes in the sense of 'excellent with regard thereto' after the words 1. पथि 2. अतिथि 3. वसति and 4. स्वपति।
This debars यत् ॥ Thus पथि साधुः = पाथेयम् 7.1.2 'provision for journey'. आतिथेयम् 'hospitality', वासतेयं 'habitable' as वासतेयी रात्रिः, स्वापतेयम् 'wealth, property'.

Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.