Declension table of ?pupurvas

Neuter	Singular	Dual	Plural
Nominative	pupurvat	pupuruṣī	pupurvāṃsi
Vocative	pupurvat	pupuruṣī	pupurvāṃsi
Accusative	pupurvat	pupuruṣī	pupurvāṃsi
Instrumental	pupuruṣā	pupurvadbhyām	pupurvadbhiḥ
Dative	pupuruṣe	pupurvadbhyām	pupurvadbhyaḥ
Ablative	pupuruṣaḥ	pupurvadbhyām	pupurvadbhyaḥ
Genitive	pupuruṣaḥ	pupuruṣoḥ	pupuruṣām
Locative	pupuruṣi	pupuruṣoḥ	pupurvatsu

Compound pupurvat -

Adverb -pupurvat