Declension table of ?tathārthatva

Neuter	Singular	Dual	Plural
Nominative	tathārthatvam	tathārthatve	tathārthatvāni
Vocative	tathārthatva	tathārthatve	tathārthatvāni
Accusative	tathārthatvam	tathārthatve	tathārthatvāni
Instrumental	tathārthatvena	tathārthatvābhyām	tathārthatvaiḥ
Dative	tathārthatvāya	tathārthatvābhyām	tathārthatvebhyaḥ
Ablative	tathārthatvāt	tathārthatvābhyām	tathārthatvebhyaḥ
Genitive	tathārthatvasya	tathārthatvayoḥ	tathārthatvānām
Locative	tathārthatve	tathārthatvayoḥ	tathārthatveṣu

Compound tathārthatva -

Adverb -tathārthatvam -tathārthatvāt