अपस्करो रथाङ्गम्

Operational rule vidhi

The word अपस्कर is formed by सुट् meaning 'the part of a chariot'.

Word by word (padaccheda)

Substitute / term अपस्करः prathamā · ekavacanaSubstitute / term रथाङ्गम् prathamā · ekavacana

Substitute / term Prathamā (1st case): in operational rules, the substitute or the thing introduced; in definitions, the term or its referent.

Full reading

अपस्करः रथाङ्गम्

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

Commentary

The word अपस्कर is formed by सुट् meaning 'the part of a chariot'.
This word is also derived from कृ with the proposition अप and the affix अप् 3.3.57 and सुट् augment. When not having this meaning, we have अपकरः ॥

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