Declension table of ?tumbayiṣyat

Masculine	Singular	Dual	Plural
Nominative	tumbayiṣyan	tumbayiṣyantau	tumbayiṣyantaḥ
Vocative	tumbayiṣyan	tumbayiṣyantau	tumbayiṣyantaḥ
Accusative	tumbayiṣyantam	tumbayiṣyantau	tumbayiṣyataḥ
Instrumental	tumbayiṣyatā	tumbayiṣyadbhyām	tumbayiṣyadbhiḥ
Dative	tumbayiṣyate	tumbayiṣyadbhyām	tumbayiṣyadbhyaḥ
Ablative	tumbayiṣyataḥ	tumbayiṣyadbhyām	tumbayiṣyadbhyaḥ
Genitive	tumbayiṣyataḥ	tumbayiṣyatoḥ	tumbayiṣyatām
Locative	tumbayiṣyati	tumbayiṣyatoḥ	tumbayiṣyatsu

Compound tumbayiṣyat -

Adverb -tumbayiṣyantam