शृङ्खलमस्य बन्धनं करभे

Operational rule vidhi

The affix कन् comes in the sense of 'clog is its fetter' after the word शृङ्खल 'a clog' when the whole word means 'a young camel'.

Word by word (padaccheda)

Substitute / term शृङ्खलम् prathamā · ekavacanaTarget अस्य ṣaṣṭhī · ekavacanaSubstitute / term बन्धनम् prathamā · ekavacanaRight context करभे saptamī · ekavacana

Substitute / term Prathamā (1st case): in operational rules, the substitute or the thing introduced; in definitions, the term or its referent.
Target Ṣaṣṭhī (6th case): names what gets replaced, "in place of X" (1.1.49 षष्ठी स्थानेयोगा).
Right context Saptamī (7th case): "when X follows", the operation applies to what precedes (1.1.66 तस्मिन्निति निर्दिष्टे पूर्वस्य). Also a condition or domain ("in the sense of").

Dotted words are technical terms. Hover or tap one to see its card.

Full reading

शृङ्खलम् अस्य बन्धनम् करभे

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

As a rewrite rule (sketch from case endings)

अस्य → शृङ्खलम् बन्धनम् / करभे

Replace asya with śṛṅkhalam bandhanam when karabhe follows. Inherited words (anuvṛtti) may add further conditions.

Commentary

The affix कन् comes in the sense of 'clog is its fetter' after the word शृङ्खल 'a clog' when the whole word means 'a young camel'.
Thus शृंखलं बन्धनमस्य करभस्य = शृंखलकः ॥ The young ones of camel are called करभ ॥ The wooden clogs put on their feet to prevent them from straying are called शृंखल ॥ Though the ropes &c are also used along with the clog, yet srinkhala being the principal object that takes away the freedom is called बन्धन or bond or fetter.

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