Declension table of ?purvayiṣyat

Masculine	Singular	Dual	Plural
Nominative	purvayiṣyan	purvayiṣyantau	purvayiṣyantaḥ
Vocative	purvayiṣyan	purvayiṣyantau	purvayiṣyantaḥ
Accusative	purvayiṣyantam	purvayiṣyantau	purvayiṣyataḥ
Instrumental	purvayiṣyatā	purvayiṣyadbhyām	purvayiṣyadbhiḥ
Dative	purvayiṣyate	purvayiṣyadbhyām	purvayiṣyadbhyaḥ
Ablative	purvayiṣyataḥ	purvayiṣyadbhyām	purvayiṣyadbhyaḥ
Genitive	purvayiṣyataḥ	purvayiṣyatoḥ	purvayiṣyatām
Locative	purvayiṣyati	purvayiṣyatoḥ	purvayiṣyatsu

Compound purvayiṣyat -

Adverb -purvayiṣyantam