Declension table of ?tatvacvas

Neuter	Singular	Dual	Plural
Nominative	tatvacvat	tatvacuṣī	tatvacvāṃsi
Vocative	tatvacvat	tatvacuṣī	tatvacvāṃsi
Accusative	tatvacvat	tatvacuṣī	tatvacvāṃsi
Instrumental	tatvacuṣā	tatvacvadbhyām	tatvacvadbhiḥ
Dative	tatvacuṣe	tatvacvadbhyām	tatvacvadbhyaḥ
Ablative	tatvacuṣaḥ	tatvacvadbhyām	tatvacvadbhyaḥ
Genitive	tatvacuṣaḥ	tatvacuṣoḥ	tatvacuṣām
Locative	tatvacuṣi	tatvacuṣoḥ	tatvacvatsu

Compound tatvacvat -

Adverb -tatvacvat