Declension table of ?tatvacvas

Masculine	Singular	Dual	Plural
Nominative	tatvacvān	tatvacvāṃsau	tatvacvāṃsaḥ
Vocative	tatvacvan	tatvacvāṃsau	tatvacvāṃsaḥ
Accusative	tatvacvāṃsam	tatvacvāṃsau	tatvacuṣaḥ
Instrumental	tatvacuṣā	tatvacvadbhyām	tatvacvadbhiḥ
Dative	tatvacuṣe	tatvacvadbhyām	tatvacvadbhyaḥ
Ablative	tatvacuṣaḥ	tatvacvadbhyām	tatvacvadbhyaḥ
Genitive	tatvacuṣaḥ	tatvacuṣoḥ	tatvacuṣām
Locative	tatvacuṣi	tatvacuṣoḥ	tatvacvatsu

Compound tatvacvat -

Adverb -tatvacvas