वॄतो वा

Operational rule vidhi

The इट् augment is optionally lengthened after वॄ , वृञ् and after roots ending in long ॠ, except in the लिट् (Perfect Tense).

Word by word (padaccheda)

Left context वॄतः pañcamī · ekavacanaIndeclinable वा avyaya

Left context Pañcamī (5th case): "after X", the operation applies to what follows (1.1.67 तस्मादित्युत्तरस्य). Also used for limits and sources.
Indeclinable An avyaya such as च "and", वा "optionally", न "not".

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

Full reading

वॄतः वा

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

Commentary

The इट् augment is optionally lengthened after वॄ , वृञ् and after roots ending in long ॠ, except in the लिट् (Perfect Tense).
As वरिता । वरीता । प्रावरिता । प्रावरीता ॥ ॠकारान्तेभ्यः । तरिता । तरीता । आस्तरिता । आस्तरीता ॥ वृत इति किम् । करिष्यति हरिष्यति । अलिटीत्येव । ववरिथ । तैरिथ ॥ Why do we say 'after वृ and long ॠ ending roots'? Observe करिष्यति and हरिष्यति ॥ Why do we say except in the Perfect? Observe ववरिथ and तैरिथ ॥

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