The samāsānta affix does not come after a tat-puruṣa samāsa of words like rājan etc. herein taught, when the negative particle na 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)).,