योजनं गच्छति

Operational rule vidhi

The affix ठञ् comes in the sense of 'who goes' after the word योजन in the Accusative -2nd case construction.

Word by word (padaccheda)

Object योजनम् dvitīyā · ekavacanaVerb गच्छति tiṅanta

Object Dvitīyā (2nd case).
Verb A finite verb form (tiṅanta).

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Full reading

योजनम् गच्छति

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 'who goes' after the word योजन in the Accusative -2nd case construction.
Thus योजनं गच्छति = यौजनिकः ॥

Vart:- So also after the words क्रोशशत and योजनशत. As क्रौशशतिकः, यौजनशतिकः ॥

Vart:- The affix after these two words means also "who is worthy to be approached from so far". As क्रोशशतादभिगमनमर्हति = क्रौशशतिको भिक्षुः, यौजनशतिक आचार्यः ॥

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