Declension table of ?aviṣyat

Masculine	Singular	Dual	Plural
Nominative	aviṣyan	aviṣyantau	aviṣyantaḥ
Vocative	aviṣyan	aviṣyantau	aviṣyantaḥ
Accusative	aviṣyantam	aviṣyantau	aviṣyataḥ
Instrumental	aviṣyatā	aviṣyadbhyām	aviṣyadbhiḥ
Dative	aviṣyate	aviṣyadbhyām	aviṣyadbhyaḥ
Ablative	aviṣyataḥ	aviṣyadbhyām	aviṣyadbhyaḥ
Genitive	aviṣyataḥ	aviṣyatoḥ	aviṣyatām
Locative	aviṣyati	aviṣyatoḥ	aviṣyatsu

Compound aviṣyat -

Adverb -aviṣyantam