अवसमन्धेभ्यस्तमसः

Operational rule vidhi

The affix अच् comes after the word तमस् when preceded by the words 1. अव 2. सम् 3. अन्ध in a compound.

Word by word (padaccheda)

Left context अव- सम्- अन्धेभ्यः pañcamī · bahuvacanaLeft context तमसः pañcamī · ekavacana

Left context Pañcamī (5th case): "after X", the operation applies to what follows (1.1.67 तस्मादित्युत्तरस्य). Also used for limits and sources.

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

अव-सम्-अन्धेभ्यः तमसः

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

The affix अच् comes after the word तमस् when preceded by the words 1. अव 2. सम् 3. अन्ध in a compound.
Thus अवतमसम्, सन्तमसम्, अन्धतमसम् ॥

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