A tat-puruṣa compound, with the exception of that which is formed by the particle nañ , and or the karmadhāraya compound, becomes neuter gender, in the cases explained in the following sūtras.,
This is a governing sutra and regulates the sense of the succeeding aphorisms which show when a Tat-purusha may be neuter. Thus, ब्राह्मणसेनम् or ना 2.4.25; but दृढसेनो राजा (the compound not being Tat-purusha); असेना (it being a compound with नञ् = अ); and परमसेना (it being Karmadharaya).,