3.2.10
वयसि च
Operational rule vidhi
The affix अच् comes after the verb हृञ् when the object is in composition with it and when the meaning of the word to be formed is descriptive of age.
Word by word (padaccheda)
Right context वयसि saptamī · ekavacanaIndeclinable च avyaya
- 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").
- Indeclinable An avyaya such as च "and", वा "optionally", न "not".
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Full reading
वयसि च
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
The affix अच् comes after the verb हृञ् when the object is in composition with it and when the meaning of the word to be formed is descriptive of age.
In this sutra the verb हृञ् has the sense of udyamana which was specifically excluded in the last. The word वयस् means the condition of human body as dependent upon time. This rule applies to those words which indicate the attainment of appropriate age for the accomplishment of objects described by the upapada, or the reaching of that age in which the thing described by the upapada naturally takes place; as अस्थिहरः श्वा 'the dog that has reached the age when it can chew bones' (lit. when it can raise it up); कवचहरः क्षत्रियकुमारः 'the Kshatriya boy old enough to wear (lit. 'to raise up or bear') the shield'; so that the verb here has the sense of 'raising up'.
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.