5.4.71
नञस्तत्पुरुषात्
Operational rule vidhi
The समासान्त affix does not come after a तत्-पुरुष समास of words like राजन् etc. herein taught, when the negative particle न precedes them.
Word by word (padaccheda)
Left context नञः pañcamī · ekavacanaLeft context 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.
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Full reading
नञः
Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.
Commentary
The समासान्त affix does not come after a तत्-पुरुष समास of words like राजन् etc. herein taught, when the negative particle न precedes them.
Thus अराजा, असखा, अगौः 5.4.91 and 5.4.92 prohibited). Why do we say "after a Tatpurusha compound?" The same words preceded by the negative particle will take the samasanta affix when forming compounds other than Tatpurusha, as अणृचो मानवकः, अधुरं शकटम् ॥ 5.4.74 applied)).
Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.