Declension table of ?tatvaṅgvas

Neuter	Singular	Dual	Plural
Nominative	tatvaṅgvat	tatvaṅguṣī	tatvaṅgvāṃsi
Vocative	tatvaṅgvat	tatvaṅguṣī	tatvaṅgvāṃsi
Accusative	tatvaṅgvat	tatvaṅguṣī	tatvaṅgvāṃsi
Instrumental	tatvaṅguṣā	tatvaṅgvadbhyām	tatvaṅgvadbhiḥ
Dative	tatvaṅguṣe	tatvaṅgvadbhyām	tatvaṅgvadbhyaḥ
Ablative	tatvaṅguṣaḥ	tatvaṅgvadbhyām	tatvaṅgvadbhyaḥ
Genitive	tatvaṅguṣaḥ	tatvaṅguṣoḥ	tatvaṅguṣām
Locative	tatvaṅguṣi	tatvaṅguṣoḥ	tatvaṅgvatsu

Compound tatvaṅgvat -

Adverb -tatvaṅgvat